generate response: It should be on Wednesday as well, and depart from the stansted airport. Intent: find_train. Slots: restaurant-area=centre, restaurant-bookday=wednesday, restaurant-bookpeople=4, restaurant-booktime=16:45, restaurant-food=chinese, restaurant-name=charlie chan, restaurant-pricerange=cheap, train-arriveby=11:30, train-day=wednesday, train-departure=stansted airport, train-destination=cambridge
Response: There are 6 trains that will arrive prior to 11:30. Do you prefer a particular arrival time?