Dear Felix
I had mixed feelings when I learned of your new assignment. I guess the old saying that "all good things must come to an end" is true. Although we will miss you, we have to admit that management has made a wise choice in placing you where they can benefit most from your talents. We will long remember the hard work and happy moments we have shared. You have been a great team member. Best wishes and keep up the good work.
Regards
Lydia