generate response: I don't care about price. I need to book a table for 4 at 18:45 on Saturday.. Intent: book_restaurant. Slots: restaurant-area=centre, restaurant-bookday=saturday, restaurant-bookpeople=4, restaurant-booktime=18:45, restaurant-food=chinese, restaurant-pricerange=dontcare
Response: I'm afraid none of the restaurants are available at that date an time. Is there another date or time that would work for you?