It's bad enough to have to cancel your vacation plans, but it's even worse when you have to cancel your reservations. However, you are not obligated to complete it. Simply phone our customer service line, tell us about your reservation, and we'll take care of the rest. Any Hawaiian Airlines flight ticket can be canceled both online and offline. The airline, in fact, has a customer service motif, and you may contact a Hawaiian Airlines representative.
See at: Hawaiian Airlines Cancellation Policy
See also: Air France Cancellation Policy || Lufthansa Cancellation Policy