generate response: I'll take the earliest train. I need two tickets and the reference number.. Intent: book_train. Slots: train-bookpeople=2, train-day=tuesday, train-departure=cambridge, train-destination=london kings cross, train-leaveat=19:00
Response: Booking was successful, the total fee is 47.2 GBP payable at the station. Reference number is : 0KAR945K . Anything else I can help with?