Who is “Sato”?

I have no class today but went to the university to meet my group of The Study of English Education class.

We need to complete the assignment by next Wednesday due to prepare for the model teaching presentation.

The work we did today improved greatly, but I made the worst mistake in the world.

I called one of my friends "Sato", but his name is "Hoshino".

After he went to another class, the other group members asked me why I had called him "Sato".

It was unconscious!!

Of course I know he is "Hoshino" but......well....I was crazy at that time.

Whether he is Hoshino or Sato, he is a very good man.

.......So sorry. m(__)m