To reserve a seat on a Southwest Airlines flight, passengers must be familiar with the Southwest Seat Selection process. Although Southwest Airlines guarantees a seat to every customer who has booked their flight, they cannot promise that you will get your desired seat. Therefore, it's essential to make a seat selection before checking in.

Here are the details of the Southwest Seat Selection policy:
- Seat selection is based on the boarding assignment of A, B, or C and positioning between 1 to 60.
- Passengers can select their seat number at the time of boarding.
- To determine the exact location of a seat, passengers can visit the official website of Southwest Airlines.

If you want to ensure that you get the seat you prefer, it's best to follow the Southwest Seat Selection policy guidelines. This can make your travel experience more comfortable and enjoyable.