generate response: I would like to leave after 13:00.. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=13:00
Response: First train out after 13:00 is TR6193, leaving at 13:40. It's a 28-minute trip, and each ticket is 8.08GBP. Would you like to book passage?