generate response: OK go ahead and book a table for 3 people at 18:00 on thursday.. Intent: book_restaurant. Slots: restaurant-area=north, restaurant-bookday=thursday, restaurant-bookpeople=3, restaurant-booktime=18:00, restaurant-food=chinese, restaurant-name=hakka
Response: I do apologize, but they're all booked up. Would you like to try another day or time slot?