generate response: No need to book it. But, can I get the travel time and what time it will get me to the airport?. Intent: find_train. Slots: train-day=wednesday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=15:45
Response: The travel time is 28 minutes and you will arrive at the airport by 17:08. Is there anything else I can help with?