https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/como-llamar-a-un-agente-en-vivo-en-delta-airlines.pdf
https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/step-by-step-15-ways-to-talk-to-a-live-agent-at-alaska-airlines-call-chat-more.pdf
