https://intercom.help/sams-international/en/articles/10799964-no-risk-booking-full-what-is-the-refundable-option-on-expedia
https://intercom.help/sams-international/en/articles/10798759-100-refund-tricks-what-is-the-refundable-option-on-expedia
https://intercom.help/sams-international/en/articles/10798758-revealed-what-is-the-refundable-option-on-expedia
https://intercom.help/sams-international/en/articles/10798681-secret-what-is-the-refundable-option-on-expedia