generate response: I need to go on Sunday, sometime after 16:00.. Intent: find_train. Slots: train-day=sunday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=16:00
Response: I have four trains leaving after 16:00, the first at 17:59, arriving at 19:27, and then leaving at 2 hour intervals with the last at 23:59 arriving 1:27 Monday.