Need a restaurant table reservation system with a waitlist

I run a restaurant and want to move away from phone-only bookings to an online reservation flow that reflects how busy the dining room gets on evenings and weekends. A guest should open the booking page, choose a date, a time slot and the number of people in their party, and see right away whether a table is available. Right now we lose bookings because staff are tied up on the phone during service.

The part I care about most is the waitlist behaviour. If there is no free table for the requested time, the system should not just say there is nothing available — it should offer to add the guest to a waitlist. When a table opens up, whether from a cancellation or a change in party size, the next guest in the queue should get an automatic notification, ideally by SMS or email, with a short window to confirm before the offer moves to the next person in line.

I would also like basic table management for staff: a list of tables with seating capacity and layout, the ability to block off slots for private events, and one screen showing the day's bookings and waitlist for the host stand. Suggest whether a lightweight custom build or customizing an existing booking engine makes more sense.

What matters most:
— clear guest flow: date, time, party size, confirmation
— automatic waitlist with notification when a table frees up
— staff screen showing bookings and waitlist by day
— works well on a phone at the host stand