On the leg from DLH to ORD, I left my glasses in my seat, on the airplane. I didn’t relieve it until I was well into the terminal, I went back to the gate and found the door to the jetway closed and locked. The flight attendant that that worked the trip came through the jetway door. I explained my situation and my seat number. The flight attendant went back into the plane and retrieved my glasses. An act of kindness s as ms professionalism.