generate response: can you book me 3 tickets please?. Intent: book_train. Slots: train-bookpeople=3, train-day=sunday, train-departure=cambridge, train-destination=london kings cross, train-leaveat=16:15
Response: The total for 3 tickets is 56.64 GBP, which you can pay at the station. Your Reference number is : 8YCZ9HSM .