generate response: Can you book me a table for 6 at 15:00 on sunday?. Intent: find_train. Slots: restaurant-bookday=sunday, restaurant-bookpeople=6, restaurant-booktime=15:00, restaurant-food=chinese, restaurant-pricerange=expensive
Response: I'm sorry but it is not possible to book that time slot at that restaurant. May I try another time and/or day for you?