generate response: No, the first train after 15:15 will work. I need to book the trip for 8 people, and please include my reference number.. Intent: book_train. Slots: train-bookpeople=8, train-day=monday, train-departure=cambridge, train-destination=birmingham new street, train-leaveat=15:15
Response: Train TR7900 leaves cambridge for birmingham new street monday at 16:01. Your reference number is OCF8O3GJ .