Look, It's Ethan Hawke

I pointed. "Look, it's Ethan Hawke."
"Who?"
"Ethan Hawke. The actor."
Blank look.
"You know, he was in those movies where he walked around with that girl."
"Which girl?"
"I can't remember her name. Anyway, it's him."
"Where?"
"He's gone now."
Blank look.
"I could tell you that he's still here," I said.
"Who?"
"Ethan Hawke. You don't recognise him, so I could tell you that he's still here. You won't know."
Blank look.
"That's him over there..."