Able to change seats on second leg of a through flight?
Flying a T fare from SJO-DFW on 972. Currently in 10E and F for whole return trip. Would like 9D and E for SJO-MIA leg, as it is taken from MIA-DFW, but not SJO-MIA; however I can not split my assignment into separate legs, at least not on line. Is it possible to split a through flight into two separate seat assignments?