generate response: I have no preference for departure time as long as I arrive by 14:45.. Intent: find_train. Slots: train-arriveby=14:45, train-day=wednesday, train-departure=cambridge, train-destination=leicester, train-leaveat=dontcare
Response: Ok there is one that leaves Cambridge at 12:21 and arrives in Leicester at 14:06. Would you like to book that one?