Please accept my sincere apology for the inconvenience that I caused you by adding the extra visiting without your permission.
I had no intention of intruding on your personal life. In China, arranging interesting leisure activities for visitors is a common way to show welcome. However, as your receptionist, I should have realized that you are inclined to regard your private time as an inviolable treasure and hate to be harassed by unplanned matters.
I’m really sorry that I didn’t check with you before making such incomsiderate arrangement .All I can say is that it won’t happen again.
I am terribly sorry to tell you that I am unable to attend your birthday part next Thursday evening. That is owing to the fact that my younger brother suddenly fell ill and was taken to a hospital this morning. I have to go there immediately and take care of him. As told by the doctor in charge, it will take around five days for him to recover and I have asked my boss for a leave.
I really regret that I cannot go to celebrate your birthday personally and would miss the perfect chance of enjoying myself with all our old friends. I have chosen a small gift for you and will send it to you tomorrow to show my best wishes. Besides, please give my regards to our friends when you meet them at the party.
Dear Mr. Smith,
I am indeed very sorry that I missed the examination on International Business English Writing you gave last Friday. I feel awful about it and want you to know what happened that day.
I suddenly fell sick early that morning and my parents had to send me to the hospital. Please find enclosed a copy of the medical bill.
I sincerely hope you can understand my situation and accept my apology. I would appreciate your allowing me to take a make-up examination. I will come to your office during your office hour on Monday to discuss this possibility with you.
Once again, I apologize for any inconvenience caused.