generate response: I would like 2 tickets please.. Intent: book_train. Slots: train-arriveby=10:30, train-bookpeople=2, train-day=tuesday, train-departure=cambridge, train-destination=london liverpool street
Response: Your reservation for 2 on the TR4259 train was successful, the total fee is 33.2 GBP payable at the station. Your Reference number is : FNRSFZWB