https://support.coros.com/hc/en-us/community/posts/30802310190868-Fast-Fly-%F0%9D%9F%AA%F0%9D%9F%A8%F0%9D%9F%A8-%F0%9D%9F%A9%F0%9D%9F%A5%F0%9D%9F%AA-%F0%9D%9F%A2%F0%9D%9F%A9%F0%9D%9F%A4%F0%9D%9F%AB-Cancellation-Refund-Policy-What-is-Lufthansa-cancellation-policy