generate response: I apologize, I actually need to leave after 16:30. Intent: find_train. Slots: train-arriveby=17:00, 5:00 pm, train-day=friday, train-departure=cambridge, train-destination=norwich, train-leaveat=16:30
Response: No problem, but I'm afraid there are no trains leaving after 16:30 and arriving by 17:00. Might I suggest TR7047, which leaves Cambridge at 16:36 and arrives in Norwich by 17:55?