generate response: Can you book the train that will arrive at 18:01 and I need 4 tickets.. Intent: book_train. Slots: train-arriveby=18:30, train-bookpeople=4, train-day=friday, train-departure=cambridge, train-destination=broxbourne
Response: Your booking was successful and the total fee is 71.59 GBP, which is payable at the station. Your reference number is D3L643YZ .