generate response: I'll be leaving from stansted airport and heading to cambridge. I need to get there by 19:30.. Intent: find_train. Slots: train-arriveby=19:30, train-day=thursday, train-departure=stansted airport, train-destination=cambridge
Response: The latest train you can take is the 18:24 train out of stansted, which arrives in cambridge at 18:52. Would you like took book a seat?