generate response: I would like Mexican, I would need a table for 6 at 16:00 on Monday. Intent: book_restaurant. Slots: restaurant-area=south, restaurant-bookday=monday, restaurant-bookpeople=6, restaurant-booktime=16:00, restaurant-food=mexican, restaurant-pricerange=expensive
Response: I'm sorry, but they have no openings at that time. Care to try a different day or perhaps a different time?