This brief goodbye letter expresses sorrow that the recipient is leaving.
Dear {Recipient},
I am so sad to hear that you will be leaving us. I will always miss your {list positive traits}. I don't think I'll ever find another person who can {skill} as well as you can. I hope you're very happy wherever you end up.
It really breaks my heart that I won't get to see you any more. Let's try to stay in touch.
Best wishes,
{Sender}
