generate response: Yes please book it for 4 people on Tuesday and once booked, please send me the reference number.. Intent: book_train. Slots: restaurant-area=north, restaurant-bookday=tuesday, restaurant-bookpeople=4, restaurant-booktime=16:00, restaurant-food=chinese, restaurant-name=hakka, restaurant-pricerange=expensive, train-arriveby=13:45, train-bookpeople=4, train-day=tuesday, train-departure=ely, train-destination=cambridge
Response: Thank you, the booking was successful, total cost of 17.6 GBP payable at the station. The reference number is 9U62ZK58 .