Who is He ?

It happen to be one of my classmate friend has operated on my Father.
Now the thing is, I am not able to re-collect him in my memory by his name;
What more awful is, I spoke with him on the phone
and I am still not able to figure it out "Who is he?"
To make the matter more complicated, I can’t acknowledge that I don’t know him as it will look inappropriate.

What is encouraging is, Some People do remember me after all these years.

Tag: Friend