My adult son has high-functioning autism and will be flying alone. He needs to make a connecting flight at JFK on the way to his destination of Taiwan, and at SFO on the way home. He will be overwhelmed and very stressed to navigate the airport and do the connecting flights on his own. The airlines said they will not treat him "any differently than any other passenger." I am looking at airport concierge services, but I can't find any reviews to help me choose a good one. In fact, I can find little info on them. Has anyone here used one of these services?