Who are you?

 I do not know who you are
Your name has been mislaid
I know you told me once before
But names do tend to fade

I saw you waving out hello
We stopped and shared a chat
But still, don't know who you are
Just recognized your hat

Where did we meet? I wished I'd say
and how do you know me?
But I just stand like a dope
with my bad memory 

The only thing I tend to know
My only claim to fame
that is you had a cat or dog
I would always know their name.