generate response: I'd like to book this train for 7 people, if possible.. Intent: book_train. Slots: train-bookpeople=7, train-day=friday, train-departure=cambridge, train-destination=peterborough, train-leaveat=12:30
Response: You're all booked! 7 tickets from Cambridge to Peterborough at 12:34. Your reference number is I9UBCZW2 .