To remove a single passenger from a multi-person reservation on Southwest Airlines, you must "split" the PNR (Passenger Name Record). This cannot be done through the standard "Cancel" button on the website, as that would cancel the entire reservation for everyone. Instead, you should contact Southwest Airlines customer service via their toll-free number (1-800-435-9792) or use the chat feature in the Southwest app. Ask the agent to "divide" or "split" the reservation; they will move the passenger you wish to remove onto a new, separate confirmation number. Once that passenger has their own unique code, you can then cancel that specific reservation independently. If the ticket was booked with points, the points will be redeposited into the original account; if paid with cash, the funds will be converted into a Transferable Flight Credit (for Wanna Get Away fares) or refunded to the original payment method (for Business Select or Anytime fares). Splitting the reservation ensures that the remaining passengers' flights and seat positions remain completely unaffected.