generate response: That will work, thanks. I need tickets for 3 people, please. Can you also provide a reference number once they're booked?. Intent: book_train. Slots: train-arriveby=21:15, train-bookpeople=3, train-day=tuesday, train-departure=london liverpool street, train-destination=cambridge
Response: I have booked it for you and the reference number is: ZBGBFGTB