Is there any need for it to be word for word?
You come out of the mists and see a caravan with a bunch of swarthy people with brightly colored clothing. You hear the sound of music.
You approach the man who seems to be the leader of this group of natives. If you are armed, he says something like, "Do you dare threaten us in our own camp, foolish giorgio?"
Otherwise, he makes some kind of comment about you looking lost. You can ask to show him your furs or see his wares. You can ask about this place. He warns you about not going around in the night "for your sake" when you start to leave.
Etc.
Sprinkle in giorgio and other Vistani words for flavor.
I don't like to ignore a "plea for help," but this seems like something it is trivial to do for yourself--compared to how much effort running a campaign is going to be