ticket booking instructions need to specify that "airline" field must be the 2-letter airline code

[AndrewBrook-Google]

Machine tries to do this:

POST /tickets/insert?airline=Southwest&flight_number=158&departure_airport=SFO&arrival_airport=LAS&departure_time=2024-04-08+08:36:00&arrival_time=2024-04-08+10:00:00 HTTP/1.1

but the airline field needs to be "WN", not "Southwest"