generate response: Yes I'd like to book for 3 and get the reference number if I could.. Intent: book_train. Slots: train-arriveby=21:30, 21.30, train-bookpeople=3, train-day=tuesday, train-departure=cambridge, train-destination=stansted airport
Response: Booking was successful, the total fee is 30.29 GBP payable at the station. Reference number is TXK6U7DG .