generate response: Great can I get 6 tickets for that?. Intent: book_train. Slots: train-bookpeople=6, train-day=tuesday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=09:30, 9:30
Response: Booking was successful, the total fee is 99.6 GBP payable at the station . Reference number is : PAR7KYOS .