Am I? Or Am I Not?

I had my calls cancelled today (except this evening's) so I popped to the corner shop to buy myself a chocolate treat.

As I came out, an old man who was just going in, pointed at me and said "Ah!"

Then he said "Oh!"

I stepped to one side as he entered the shop.

"Sorry?" I said.

Without even looking at me he said "I thought you were someone, but you're not".

That was a 'deep' statement and as I walked home I couldn't help but wonder 'What or who the hell am I?'

I'll have to wait until the plumber comes to fix the leaky radiator and ask him!