https://forum.aerosoft.com/index.php?/topic/181102-14-ways-to-contact-united-airlines-without-long-wait-times/
https://www.fmsite.net/forums/topic/106259-15-fastest-ways-to-speak-to-a-live-agent-at-united-airlines/
https://audiokarma.org/forums/index.php?threads/how-to-talk-to-a-live-agent-at-air-canada-airlines-representative.1088966/
https://audiokarma.org/forums/index.php?threads/6-ways-to-talk-to-a-delta-airlines-representative-without-the-wait.1088965/