generate response: No, that's okay. Could you get me the reference number for my train tickets, though?. Intent: book_train. Slots: train-arriveby=19:45, train-bookpeople=3, train-day=wednesday, train-departure=cambridge, train-destination=broxbourne
Response: Your booking was successful. the total fee is 53.7 GBP and your reference number is ZLBJ2U2O .