Dear Mary,
Thank you very much for inviting me to your party. I am very sorry, but I can’t come. My mother is ill. The doctor has told her that she should stay in bed for several days. I’ll take care of my mother. Thank you very much for sending me such a beautiful postcard. I like it very much. I am going to put it on my desk.
Could I hear from you soon?
Give my best wishes to your family.
Yours,
Han Meimei