https://www.thegearpage.net/board/index.php?threads/20-ways-to-speak-to-someone-at-delta-tm-airlines-r-a-complete-guide.2673361/
https://discussion.ntrack.com/t/top-5-proven-techniques-to-connect-with-a-live-agent-at-united-airlines-a-step-by-step-guide/20303
https://www.supramania.com/threads/como-puedo-hablar-con-alguien-de-latam-presentante-de-latam-airlines.338429/
https://epicflightacademy.com/aviation-forums/topic/faqs-agent-how-do-i-escalate-an-issue-with-united-airlines/#new-topic-0
https://discussion.ntrack.com/t/15-ways-to-call-american-airlines-usa-contact-numbers-a-full-detailed-guide/20283
