generate response: I don't care when I depart as long as I make it to Cambridge by 20:45.. Intent: find_train. Slots: train-arriveby=20:45, train-day=thursday, train-departure=bishops stortford, train-destination=cambridge, train-leaveat=dontcare
Response: I have eight trains matching your preferences. Would you like me to book TR0060 that arrives at 20:07?