generate response: I am going to stevenage on thursday and need a ticket leaving cambridge anytime after 15:30 please. Intent: find_train. Slots: train-day=thursday, train-departure=cambridge, train-destination=stevenage, train-leaveat=15:30
Response: The train leaves every 2 hours starting at 17:21. Would you like me to book a ticket on any of the 4 trains available after 15:30?