generate response: I am leaving from Cambridge and going to Ely. I want to leave at 18:15. Intent: find_train. Slots: train-day=friday, train-departure=cambridge, train-destination=ely, train-leaveat=18:15
Response: Train 6053 leaves cambridge at 19:50 and arrives in ely at 20:07. Would you like me to book you a ticket?