https://www.zero88.com/forum/topic/13874-modify-your-booking-connect-with-allegiant-airlines%C2%AE-help/
https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/52971/como-puedo-hablar-con-un-representante-de-delta-airlines_-%281.pdf
https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/_sid_/betichod.pdf
https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/_sid_/%C2%BFC%C3%B3mo-cambiar-el-nombre-en-Delta-por-matrimonio.pdf
https://www.zero88.com/forum/topic/13248-proven-8-ways-to-talk-to-live-agent-at-westjet%C2%AE-airline%C2%AE%EF%B8%8F-a-complete-guide/
https://nch.invisionzone.com/topic/91804-~-how-can-i-speak-to-someone-at-expedia%C2%AE-reservation-in-usa-a-complete-guide/