generate response: What is the reference number, please?. Intent: book_restaurant. Slots: restaurant-area=centre, restaurant-bookday=saturday, restaurant-bookpeople=1, restaurant-booktime=17:00, restaurant-food=chinese, restaurant-name=charlie chan
Response: The reference number for your booking is N36OGS3I, this table will be held for 15 mins should you not arrive at your reserved time.