generate response: Yes, please book me for 4 people, and dont forget the reference number.. Intent: book_train. Slots: train-arriveby=14:07, train-bookpeople=4, train-day=wednesday, train-departure=cambridge, train-destination=bishops stortford, train-leaveat=12:45
Response: You are all set for four on the train. Your reference number is CNKR13ES . Anything else I can help you with?