generate response: I need to arrive by 15:15, can you give me a train ID matching that and a departure time?. Intent: find_train. Slots: train-arriveby=15:15, train-day=wednesday, train-departure=stansted airport, train-destination=cambridge
Response: TR5499 leaves Stansted Airport at 14:24 and arrives in Cambridge at 14:52. Would that work for you?