generate response: 2 people. I need the reference number too.. Intent: book_train. Slots: train-bookpeople=2, train-day=tuesday, train-departure=cambridge, train-destination=kings lynn, train-leaveat=19:45
Response: Ah, it appears that the earliest train, TR9926, leaves at 20:11, but it does arrive by 20:58. If that is okay, I could book that for you.