https://emirates-helpcenter.gitbook.io/ways-to-reach-emirates-airlines-customer-service-via-phone-emails-or-chat-a-step-by-step-guide
https://official-united-airlines-helpcen.gitbook.io/ways-to-reach-united-airlines-customer-service-via-phone-number-chat-and-email-a-step-by-step-guide
https://official-united-helpcenter-usa.gitbook.io/ways-to-contact-united-airlines-customer-service-phone-number-email-and-chat-a-detail-guide
https://official-united-helpgroup.gitbook.io/ways-to-reach-united-airlines-customer-service-via-phone-email-or-chat-a-full-guide
https://official-jetblue-helpcenter-usa.gitbook.io/ways-to-call-jetblue-customer-service-via-phone-email-or-chat-options-a-step-by-step-guide
https://official-jetblue-airline-helpgui.gitbook.io/ways-to-reach-jetblue-customer-service-phone-number-chat-and-email-options-a-complete-full-guide