text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE FLIGHTS (Airline VARCHAR); CREATE TABLE AIRLINES (Airline VARCHAR, uid VARCHAR)
  ### Question:
  Which airline has most number of flights?
  ### Answer:
  SELECT T1.Airline FROM AIRLINES AS T1 JOIN FLIGHTS AS T2 ON T1.uid = T2.Airline GROUP BY T1.Airline ORDER BY COUNT(*) DESC LIMIT 1