https://community.hologram.io/t/faq-guide-what-is-the-cancellation-policy-on-american-airlines/21990 community.hologram.io
https://www.devex.com/people/avianca-telefono-como-llamar-a-avianca-en-estados-unidos-2263867 devex.com
https://www.devex.com/people/guia-para-como-hablar-con-una-persona-en-american-airlines-2264512 devex.com