instruction: show DL flights from JFK to MIAMI
response: SELECT DISTINCT flight.flight_id FROM airport, airport_service, city, flight WHERE (airport.airport_code = 'JFK' AND city.city_code = airport_service.city_code AND city.city_name = 'MIAMI' AND flight.from_airport = airport.airport_code AND flight.to_airport = airport_service.airport_code) AND flight.airline_code = 'DL'