Customers who have purchased an additional seat to accommodate a special seating need due to size or disability may request a refund of the additional seat purchase by sending us an e-mail request at southwest.com/feedback or by calling Southwest at 1-800-I-FLY-SWA (1-800-435-9792).  Even if the flight experiences an oversale (having more confirmed Customers waiting to board than seats on the aircraft) we will refund the cost of the extra seat(s).  Looks like you are good to go.