generate response: I will take the earlier one, can you reserve me 7 tickets and provide me with the reference number?. Intent: book_train. Slots: train-bookpeople=7, train-day=sunday, train-departure=cambridge, train-destination=bishops stortford, train-leaveat=20:30
Response: Great! You're booked with reference number NHA8SEGI . The total fee is 56.56 GBP payable at the station. Anything else?