Sometimes it is like this
I'm in a room where I know nobody. I'm the youngest person in the room. I know, I know. And I am standing next to someone... whom I know! But I don't know his name, I've forgotten it. I don't know him very well. But he says hello to me, by name. And then...
LADY ON OTHER SIDE OF HIM: Mister Schmidt! Hello!
HIM: Hi, Pam! Oh, but you should call me Jim.
LADY ON OTHER SIDE OF HIM: Oh, I know. And it's not even Mister Schmidt - It's DOCTOR Schmidt!
Then she left. And I had a nice little conversation with my acquaintance, Doctor Jim Schmidt.
LADY ON OTHER SIDE OF HIM: Mister Schmidt! Hello!
HIM: Hi, Pam! Oh, but you should call me Jim.
LADY ON OTHER SIDE OF HIM: Oh, I know. And it's not even Mister Schmidt - It's DOCTOR Schmidt!
Then she left. And I had a nice little conversation with my acquaintance, Doctor Jim Schmidt.