generate response: ok, provide reference number too please.. Intent: book_restaurant. Slots: restaurant-area=north, restaurant-bookday=monday, restaurant-bookpeople=5, restaurant-booktime=16:15, restaurant-food=asian oriental, restaurant-name=saigon city, restaurant-pricerange=expensive
Response: The booking was successful. The table will be reserved for 15 minutes. Reference number is : UM6YO5NS .