Be sincere and express your feelings of sympathy. Please accept my sympathy for your sad loss.To the family who have lost a child. Make sure you include the name of the person who died or mention the specific incident that caused sorrow for the person. I am so sorry for your loss. "I am deeply sorry for your loss. A letter offering sympathy for the death of a child respectfully acknowledges the reader's misfortune while offering comfort and support. Meaningful, personal, and compassionate letters of condolence can be both a tribute to the child who died and a source of comfort to the parents.