generate response: Yes, go ahead and book 4 tickets for me on that train! Once that is done, can I have the reference number?. Intent: book_train. Slots: train-bookpeople=4, train-day=monday, train-departure=cambridge, train-destination=kings lynn, train-leaveat=17:45
Response: Booking was successful, the total fee is 39.2 GBP payable at the station. Reference number is : Y9FTRIGK . Is there anything else I can help with?