Activity
- https://community.cisco.com/t5/cisco-one-discussions/is-there-a-penalty-to-cancel-a-%C3%BA%C3%B1%C3%AF-%C3%AA%C3%B0-l%C3%AFgh/m-p/5241469#M800
- https://www.devex.com/people/united_travel_agency-is-there-a-penalty-to-cancel-a-united-flight-2304054
- https://www.devex.com/people/what-is-the-cancellation-policy-for-united-airlines-2303623
