generate response: I will take the 21:01. the ticket is just for me and I would like a reference number after the booking is completed.. Intent: book_train. Slots: train-bookpeople=1, train-day=wednesday, train-departure=cambridge, train-destination=birmingham new street, train-leaveat=21:00
Response: I have successfully booked you for the TR7935 train leaving at 21:01. Your reference number is E9ZIOMAN .