generate response: Yes, please. Can you book me 4 tickets?. Intent: book_train. Slots: train-bookpeople=4, train-day=monday, train-departure=bishops stortford, train-destination=cambridge, train-leaveat=19:30
Response: Booking was successful, the total fee is 40.4 GBP payable at the station. Reference number is : H4BIFD0U . Will there be anything else today?