generate response: I would like to leave on saturday around 13:15 going to london liverpool street.. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=london liverpool street, train-leaveat=13:15
Response: There are 6 trains that meet your requirements, the closest in time being the TR4466. It leaves at 13:59. Would you like to book a ticket?