If you decide to cancel a Southwest Wanna Get Away Flight you won't get a refund of your money but you will get credit that will be applied towards a new flight when you decide to book a new flight through Wanna Get Away Flights.
There are no refunds when you cancel a Wanna Get Away Flight.
However if you do cancel a Wanna Get Away Flight you can get a credit and reuse the ticket later when you decide to book another new Wanna Get Away Flight.
Basically the way that the process works when you cancel a Wanna Get Away Flight is they'll be a credit (travel funds) applied toward future travel on Southwest Airlines for the originally ticketed passenger only.
So you will not get your money back when canceling the flight but you will be able to book another flight without paying again.
So as long as you book another flight through Wanna Get Away Flights you won't lose your money when canceling.