What: Describe your reaction when you heard the news about the death. Thank you for sharing Casey and my deepest sympathies for the tragedies of your life.A simple "I'm sorry" is sometimes the only thing that is necessary to say. My heart is filled with sympathy for you and your family during this difficult time. My boss's son just died. How should I act towards my boss when he comes back to work? How should I act towards my boss when he comes back to work? And how can I convey my sympathy in a professional manner? Sympathy Letter to Boss - Writing a letter of sympathy for the family of you boss who just died is a very good gesture. Here is my suggestion on what to write in a sympathy card or message to your boss: "Please accept my condolences on the death of your ____.