Answer
The business case is not simply 'answer messages faster'. For a vegan restaurant, the assistant should make every enquiry more complete by covering ingredients, cross-contamination, allergens, gluten-free choices, spice levels, opening hours, reservations, takeaway and group menus.
It can let diners filter the approved menu information and ask follow-up questions before a booking, which is especially useful for international visitors with several dietary requirements.
The assistant must distinguish vegan, vegetarian and allergen-safe claims. Kitchen staff should confirm any risk of cross-contamination or ingredient substitution.
The useful model is an Own The Conversation Digital Twin: approved business knowledge is organised once, then used by the assistant and the public information layer.
The best outcomes are fewer unsuitable orders, more confident bookings and a clear record of dietary questions needing human confirmation.