https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/25-ways-to-speak-to-live-agent-at-turkish-airlines-step-by-step-guide.pdf
https://www.workingus.com/forums/topic/15-ways-to-speak-to-someone-at-american-airlines%ef%b8%8f-step-by-step-guide/
https://expediacustomersupport1238.zohodesk.com/portal/en/kb/articles/is-expedia-really-free-cancellation
https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/14-tips-for-connecting-with-allegiant-airlines-customer-service-without-waiting.pdf
https://discuss.cakewalk.com/topic/87760-%C2%BFc%C3%B3mo-hablar-directamente-con-un-agente-de-%F0%9D%90%94nited/
https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/ten-ways-to-connect-how-do-i-speak-to-someone-at-a-united-air-lines-by-phone-number-instant-faqs-guide.pdf