generate response: I need to arrive by 5pm.. Intent: find_train. Slots: train-arriveby=5pm, 17:00, train-day=friday, train-departure=london kings cross, train-destination=cambridge, train-leaveat=17:30
Response: That's physically impossible. You want to leave after 17:30 which is 5:30 pm and arrive at 5 pm? Try that again please.