Customers can cancel their airline ticket by visiting Asiana's official website for canceling tickets. Several instructions will appear on the screen during the flight cancellation process, so please follow them carefully. Here are the processes to Cancel Asiana Airlines Flight

Visit the official website of Asiana Airlines.
Register or log in to the site.
After logging in, click on the “Manage my reservations” option.
The next step is to choose which reservation you want to cancel.
Passengers will need to follow the instructions to continue.
To complete the cancellation procedure, click “Yes, Cancel” one last time to cancel the ticket.
After completing the process, Asiana airline will send you a confirmation email to cancel the airline ticket.