generate response: The train should leave broxbourne after 11:15 so the 11:32 is a good choice. There are 5 of us traveling together. Please book.. Intent: book_train. Slots: train-bookpeople=5, train-day=sunday, train-departure=broxbourne, train-destination=cambridge, train-leaveat=11:15
Response: It has been booked. You reference number is UCICW103 .