generate response: leaving cambridge, going to stansted airport on friday anytime after 18:30. Intent: find_restaurant. Slots: train-day=friday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=18:30
Response: We've narrowed your options to 6 trains. The earliest leaves at 18:40 and the latest at 23:40. A train leaves every hour. Can I book a ticket for you?