https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/nine-ways-to-access-copa-airlines-customer-service-by-phone-number-chat-and-email.pdf
https://airallhelpdesk.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablar-con-una-persona-en-american-airlines-3-7-2025-3
https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/nine-ways-to-access-bookingcom-customer-service-by-phone-number-chat-and-email.pdf