generate response: I want to arrive at da vinci pizzeria by 15:00.. Intent: book_restaurant. Slots: taxi-arriveby=15:00, taxi-destination=da vinci pizzeria, restaurant-area=north, restaurant-bookday=sunday, restaurant-bookpeople=5, restaurant-booktime=15:00, restaurant-food=italian, restaurant-name=da vinci pizzeria, restaurant-pricerange=cheap
Response: Okay! From where are you departing?