generate response: 7 tickets please and I'll also need to get a reference number from you, just in case. Intent: book_train. Slots: train-bookpeople=7, train-day=sunday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=15:15
Response: 7 tickets on TR0189 is 92.96 GBP. You can pay that at the station. Your Reference number is : GAH6RYK1 . Can I assist you with anything else?