https://intercom.help/techsolution/en/articles/10940469-how-do-i-contact-delta-customer-service-hotline-service
https://intercom.help/expedia-cancellation-time/en/articles/10940481-is-expedia-really-free-cancellation-_or_-what-is-the-cancellation-fee-for-expedia
https://intercom.help/techsolution/en/articles/10940480-can-i-speak-with-american-airline-customer-service-outside-the-u-s-new-services
https://travel-support.deskpro.com/kb/articles/ways-to-reach-british-airways-customer-service-by-direct-phone-chat-email-a-full-focus-guide
https://intercom.help/techsolution/en/articles/10940040-expedia-customer-care-how-to-file-a-claim-with-expedia
