Which airline operated more flights on 2018/8/1, American Airlines Inc. or Endeavor Air Inc.?
SUM(Description = 'American Airlines Inc.: AA') > SUM(Description = 'Endeavor Air Inc.: 9E') means American Airlines Inc. operated more flights than  Endeavor Air Inc; SUM(Description = 'American Airlines Inc.: AA') < SUM(Description = 'Endeavor Air Inc.: 9E') means Endeavor Air Inc. operated more flights than American Airlines Inc.; on 2018/8/1 refers to FL_DATE = '2018/8/1';
SELECT CASE WHEN COUNT(CASE WHEN T3.Description = 'American Airlines Inc.: AA' THEN 1 ELSE NULL END) > COUNT(CASE WHEN T3.Description = 'Endeavor Air Inc.: 9E' THEN 1 ELSE NULL END) THEN 'American Airlines Inc.: AA' ELSE 'Endeavor Air Inc.: 9E' END AS RESULT FROM Airports AS T1 INNER JOIN Airlines AS T2 ON T1.Code = T2.ORIGIN INNER JOIN `Air Carriers` AS T3 ON T2.OP_CARRIER_AIRLINE_ID = T3.Code WHERE T2.FL_DATE = '2018/8/1'