generate response: I would like to leave at 18:00 please.. Intent: find_train. Slots: train-arriveby=19:30, train-day=saturday, train-departure=cambridge, train-destination=kings lynn, train-leaveat=19:30
Response: Train TR7579 leaves Cambridge on Saturday at 18:11 and arrives at Kingslynn at 18:58. Would you like me to book this train for you?