The have marked the chocobo somehow because you can not enter dungeons with them. (For Programmers - lets call it the Chocobo is flagged)
They do not need to change anything and just need to use the same "marker" for the dungeonfinder. The dungeonfinder should not request the players in group, but the flagged players too, its just a small infomration ONCE send... Easiest way may be to give the chocobo a "job" named Cocobo, that way they even can use the job flagging for the requesting issue...
