###HUMAN: i'm interested in a flight from DALLAS to WASHINGTON and i'm also interested in going to BALTIMORE, ###ASSISTANT: SELECT DISTINCT flight.flight_id FROM airport_service AS AIRPORT_SERVICE_0, airport_service AS AIRPORT_SERVICE_1, airport_service AS AIRPORT_SERVICE_2, city AS CITY_0, city AS CITY_1, city AS CITY_2, flight WHERE ((flight.to_airport = AIRPORT_SERVICE_1.airport_code AND CITY_1.city_code = AIRPORT_SERVICE_1.city_code AND CITY_1.city_name = 'WASHINGTON') OR (flight.to_airport = AIRPORT_SERVICE_2.airport_code AND CITY_2.city_code = AIRPORT_SERVICE_2.city_code AND CITY_2.city_name = 'BALTIMORE')) AND CITY_0.city_code = AIRPORT_SERVICE_0.city_code AND CITY_0.city_name = 'DALLAS' AND flight.from_airport = AIRPORT_SERVICE_0.airport_code