https://www.flycotravel.com/blog/southwest-airlines-cancellation-policy
Southwest Airlines Cancellation Policy
If you do not have an internet connection or would prefer assistance over the phone, you can easily call the Southwest Airlines cancellation number and make the cancellation. The Southwest staff is very sympathetic and understanding, so you don't have to worry about nervousness while talking to a stranger. You will also be notified of the cancellation policy and if your ticket is eligible for a refund, simply call the Southwest Airlines cancellation phone number and cancel the order in the comfort of your home.