Dearest Dr. D.S.,
I would like to offer my apology.
I do not intend to joke your leaving the office.
It is, nonetheless, my mistake to say that it is your retirement. Yes, you are not old.. and yes, you still have lots of spirit and energy to teach.
Unfortunately, my idiot moronic friends (RS, WA, AR) did not tell me that you are leaving for a new work. These people did not even try to help me fix the mistake. What they do (and always do..) is to start an evil plan.
All the best for your new employment sir. Take a month holiday, visit places around the world, sir. And when you start the new job in the new place, take the stupid three stooges with you. Pretty please…