Is it useful to refund the ticket by SMS because of the airline?

It is useless to refund the ticket by SMS because of the airline. When the flight is cancelled for some reason, passengers can choose to refund their tickets at the airport counter. If you are not at the airport or it is inconvenient to go to the site, you can log in to the airline official website to refund the ticket, or you can contact the ticket agent by phone to refund the ticket. After the refund is successful, the money will be returned to the payment account in a week or so.