https://www.oise.utoronto.ca/deepeningknowledge/wp-content/uploads/ninja-forms/2/25-maneras-de-hablar-con-una-persona-en-united-instrucciones-sencillas-de-llamada.pdf
https://www.bipdetroit.com/quickfire-way-to-speak-atalking-to-a-live-person-at-united-airlines-service-by-phone-email-chat-rapid-guide-phone-email-and-chat