Lol, mate, you wish!It's possible there is some individual who can answer clearly your name or what/who you are, but you can't contract that person nor she/he will ask you for money.Those kind of people appear and help if they want or to whom they want to help and them they disappear.Being clairvoyant means to be able to see clearly, after all.
BUT you can try test their credibility in this following manner: they have to know and tell you about something you never told anyone, something you hid in your mind and soul, something VERY personal that you try to hide even from God himself. If they can do that, you got your psychic.