generate response: Yes, can you book three tickets on it, please?. Intent: book_train. Slots: train-bookpeople=3, train-day=saturday, train-departure=cambridge, train-destination=stevenage, train-leaveat=18:30, after 18:15?
Response: Booking was successful, the total fee is 30.72 GBP payable at the station . Reference number is : S74F7IZS .