generate response: Yes. Please select the first train available after 14:30 and book 3 tickets. then provide me the reference number. Intent: book_train. Slots: train-bookpeople=3, train-day=wednesday, train-departure=cambridge, train-destination=birmingham new street, train-leaveat=14:30
Response: Booking was successful, the total fee is 225.3 GBP payable at the station. Reference number is : XMBOA4E1 . Can I help with anything else?