generate response: Departure time is flexible, but mid-day would be nice.. Intent: find_train. Slots: train-arriveby=08:30, 8:30, train-day=tuesday, train-departure=cambridge, train-destination=stevenage, train-leaveat=mid-day
Response: There are 2 midday trains: TR6009 departs at 11:21 and TR0743 departs at 13:21. Could I book one of these for you?