generate response: Great - I do still need to know the travel time for that train, though. The 15:21 train to stevenage?. Intent: find_train. Slots: train-day=sunday, train-departure=cambridge, train-destination=stevenage, train-leaveat=14:45
Response: The 15:21 train to Stevenage will take approximately 49 minutes to reach its destination. Is there anything else i can help you with?