generate response: I will be traveling on Tuesday and it should arrive in Cambridge by 12:45.. Intent: find_train. Slots: restaurant-area=north, restaurant-bookday=tuesday, restaurant-bookpeople=1, restaurant-booktime=16:45, restaurant-food=chinese, restaurant-name=hakka, restaurant-pricerange=expensive, train-arriveby=12:45, train-day=tuesday, train-departure=bishops stortford, train-destination=cambridge
Response: There are 4 trains that will arrive before 12:45, do you have a preferred departure time?