generate response: I don't care about the departure time so please give me the ID and price of any one of those trains.. Intent: find_train. Slots: train-arriveby=21:00, train-day=wednesday, train-departure=london liverpool street, train-destination=cambridge, train-leaveat=dontcare
Response: Okay, the trainID is TR7020 and the price is 16.60 pounds.