He

So it's not so easy as I thought!!
are you a native speaker?
thanx so much for your help!!!
take care
Milena

It sounds like it refers to this meaning (from Merriam-Webster online):
Main Entry: 7 con
Function: noun

something (as a ruse) used deceptively to gain another's confidence; also : a confidence game.

He started doing his "act," his line. His way of presenting himself to gain another's confidence, trust, etc.

I was "born in the U.S.A." So the answer is, yes.