Write a note of apology according to the situation described. Your friend lives in another city and came to visit you last Sunday, but due to some reason you were not at home. Write a note expressing your regrets on having missed seeing him or her.
Dear Sandy, May.22
It’s very kind of you to come to see me last Sunday, but it so happened that my uncle came here and I had to accompany him to visit the Summer Palace. What a pity! We haven’t seen each other for a long time. Will you come here on National Day? We will have a seven-day holiday then. Call before come.