Originally Posted by ftnoob

One reason could be that picking up the phone merely connects you with SWA reservations, who tells you that they cannot help you because there is no "ITA" ("Interrupted Travel Advisory/Authorization," or something like that) connected with your PNR. Never mind that your one hour flight left 90+ minutes late and clearly arrived after your connecting flight departed, sorry, we cannot help you, nobody put an ITA in your record. Go ahead and spend the night trying to sleep in the airport, then take your chances with what the on-site personnel can do for you when they arrive in the morning.