AI Phone Answering for Restaurants: How It Works and What to Check

AI phone answering for restaurants is software that picks up calls when your team cannot, answers common questions and books, changes or cancels tables directly in your reservation diary. It works best for the routine calls that make up most of a restaurant's phone traffic, and it should pass anything complicated to a person. This guide explains how to judge the cost of missed calls in your own venue, what to evaluate before buying, how UK data protection applies to recorded calls, and where the technology still falls short.

The missed-call problem, and how to size it for your venue

Calls arrive when you are busiest: just before service, during the lunch rush, at 6.30pm on a Friday. If nobody answers, many callers will try somewhere else. We have not found a reliable independent UK statistic on how many restaurant calls go unanswered or how many of those callers are lost, so do not trust a vendor headline number. Measure your own.

Here is a simple way to do it:

1. Pull your phone provider's call log for four weeks, or use a call-tracking app.
2. Count calls that were unanswered or abandoned during opening hours and in the two hours before service.
3. Estimate the share that would have been bookings (listen to any voicemails, or sample 20 calls).
4. Multiply by your average party size and spend per head.

A worked example with assumed figures: 12 missed calls a week, 40% of which would have been bookings, for parties of three spending £35 each. That is 12 x 0.4 x £105, or about £504 a week in missed revenue, roughly £26,000 a year if the pattern holds. Your numbers will differ, and not every lost call is a lost booking, but the method puts a price on the problem. Use our no-show cost calculator in the same way for the other side of the booking book.

The alternative to software is staffing the phone. At the National Living Wage of £12.71 an hour for those aged 21 and over (April 2026), three hours of dedicated phone cover a day, seven days a week, costs about £267 a week before employer National Insurance and holiday pay. And during service your team is rarely free to answer anyway.

What an AI phone agent can do

A good AI agent handles the repeatable calls:

• Take, change and cancel bookings against live availability.
• Answer common questions: opening hours, location, parking, dress code, menu, whether you take dogs.
• Apply your booking rules: party size limits, shift times, deposit or card requirements.
• Take messages and enquiries, such as private hire or large groups, and pass them to the right person.
• Send a confirmation by text or email so the caller has proof.
• Answer out of hours, including late-night calls you would otherwise miss.

TablePort's AI phone agent answers calls 24/7, books into the TablePort diary, and handles calls in 23 languages. It works with your existing phone number and routes urgent calls to staff.

What it should not do

Be realistic about the edges. An AI agent should not:

• Negotiate or make exceptions to your policies, such as waiving a deposit.
• Handle complaints or upset guests, who need a person quickly.
• Give allergen advice beyond information you have published and approved. Allergen questions carry legal weight, so route them to a trained member of staff or send the caller your written information. See our allergen guide.
• Promise things the diary cannot deliver, such as a specific table or a special menu.

Every setup needs a clean handover: a transfer to a staff number or a message with the caller's details and the reason for the call, rather than a dead end.

What to evaluate before you buy

Use this table in vendor conversations:

Insist on a test: call it yourself, at an awkward time, with an awkward request, and ask for a real booking to appear in the diary.

How the main options compare

The market is moving fast, and pricing and features change, so verify each vendor's current offer. As of October 2026:

• SevenRooms Voice AI is built into the SevenRooms platform. Its product page describes 24/7 answering, booking, changing and cancelling reservations, FAQ handling, recognising returning guests, staff escalation and call recordings. It does not state pricing or a list of supported languages on that page, so ask directly, including whether it is available in the UK.
• ResDiary ResPhone is an add-on at £35 plus VAT per month per diary. ResDiary's help pages describe an automated booking line on a separate number, or reached by diverting your own, that guides callers through a booking and syncs it to your diary under your existing rules, with diverted calls charged by your phone provider. The page does not describe language support or free conversation, so ask ResDiary.
• TablePort books into the TablePort diary, answers in 23 languages and covers calls, WhatsApp and SMS. It is mainly relevant if you use or are moving to TablePort for reservations.

The right choice usually follows your booking system, because the agent has to read and write to your diary. If you are still choosing that system, start with our UK booking system guide.

UK GDPR, call recording and consent

Most AI phone agents record or transcribe calls. That makes you responsible for the data. This is general information, not legal advice, and you should confirm your approach with your data protection adviser.

• Tell callers. UK GDPR requires you to give people clear information about how their data is used, including their right to be informed, as set out in the ICO's guidance, which the ICO says is under review following the Data (Use and Access) Act 2025. A short opening line such as "You're speaking to our automated assistant. This call is recorded to take your booking" is good practice, and it avoids misleading callers about who they are talking to.
• Have a lawful basis. For taking a booking, that is usually steps requested by the caller or your legitimate interests. For keeping recordings for quality or disputes, document why, and do not rely on a "calls may be recorded" notice as consent.
• Business call recording rules. The Telecommunications (Lawful Business Practice) Regulations 2000 allow businesses to record calls for specified purposes, such as establishing facts and checking standards, provided you make reasonable efforts to inform people.
• Set a retention period and delete recordings on schedule. Be ready to handle subject access and deletion requests.
• Treat allergy details with care. Allergy and dietary information can reveal health information. Ask the vendor how it is stored and for how long.
• Check the vendor as a processor. You need a data processing agreement, clarity on where data is stored, and any subprocessors such as speech or language-model providers.

For your specific setup, speak to a solicitor or data protection adviser.

Metrics to track once it is live

• Answer rate: share of calls picked up, including out of hours.
• Booking conversion: calls that end in a booking.
• Handoff rate: share passed to staff, and why. A high rate signals a gap in the agent's knowledge.
• Booking accuracy: sample 20 calls a month against the diary.
• Caller complaints about the AI, plus any hang-ups in the first ten seconds.

Review a handful of recordings weekly for the first month, then monthly. Fix wrong answers at source in the FAQ. The agent is only as good as the information and rules you give it.