https://airlinescom.zohodesk.com/portal/en/kb/articles/1-877-827-8493-how-do-i-contact-lufthansa-customer-care-3-7-2025
https://www.experts-exchange.com/questions/29290473/Seven-Ways-To-Contact-How-Reach-to-talk-at-Air-France-Informative-Guide.html
https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/fifteen-ways-to-call-bookingcom-customer-support-a-full-guide-usa.pdf
