generate response: The train should leave after 08:45 and should leave on saturday. I will need a arrival time and price. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=08:45
Response: The earliest train departs at 9:59 and arrives at 11:27 , the price is 13.28 pounds. Do you want me to book this for you?