generate response: No thanks. Go ahead and book the train for 4 people and please provide the reference number.. Intent: book_train. Slots: train-arriveby=17:15, train-bookpeople=4, train-day=sunday, train-departure=cambridge, train-destination=london kings cross
Response: Your booking was successful, the total fee is 75.52 GBP payable at the station . Your reference number is : UMS71SR7 . Your train will leave at 19:00.