generate response: I'd like to arrive by 08:15. Please select the first option that comes up and book for 6 people, then send me the reference number. Intent: book_train. Slots: train-arriveby=08:15, train-bookpeople=6, train-day=sunday, train-departure=ely, train-destination=cambridge
Response: The booking was successful and your reference number is CKRJK7NI .