https://developer-community.sage.com/topic/11457-what-is-the-cancel...
United Airlines has put forward a lucid and transparent flight cancellation and refund policy in line with its other business policies, thus eradicating the possibility of future discrepancies. United Airlines flight cancellation and refund policy variedly depending on the fare rules and types of tickets. On the part of the traveler, voluntary cancellation of United Airline flights may attract penalties to be deducted from the original fare.