Letter of apology Dear Mr Jobs, Please accept my sincerest apologies for unfulfilled promise. I realise how much this must have upset you, and I hope that we can resolve the matter agreeably. Due to an important event, I will be unable to do some extra work next weekend. I must explain you why I will not be able to work next weekend. We have received unexpected invitation on sister's wedding and I with my whole family are going to visit it. Because my relatives live far away, I will not be at home all weekend. I will try to do some work at home if possible. In an attempt to make it up, I could work longer this week, too. I hope you will accept my apologies for inconvenience caused and this incident will not deter you from using my services. Yours sincerely, Eugene (employee)