travel
https://allairlineshubhelp.zendesk.com/hc/en-us/articles/34530016371857–Lufthansa-Cancel-Without-Penalty-What-is-the-24-hour-rule-with-Lufthansa
https://allairlineshubhelp.zendesk.com/hc/en-us/articles/34530057340177-What-is-the-24-hour-rule-with-Lufthansa-LufthansaCancellationPolicy
https://otx.alienvault.com/pulse/6804234e4fe56ea543aace5e