generate response: I don't have a departure time preference. Can you let me know how much the price is for the earliest departure out of those four trains?. Intent: find_train. Slots: train-arriveby=13:45, 1:45 pm, train-day=friday, train-departure=cambridge, train-destination=ely, train-leaveat=dontcare
Response: TR1709 leaves at 5:50 and is 4.40 pounds, there are later trains also at the same price. Would you like to book a seat?