grammar sorry for not beenbeing able to participate
These events range from meetings, interviews, weddings, anniversaries, exhibitions, etc. Though you desire to attend any event you have been to, at times, it is not possible to attend. To maintain good relationships and act professionally, it is ethical to write an excuse letter to express your regret for not attending the event. Please accept my apologies. I have a pressing business engagement that evening. I regret that I will not be able to attend on October 24th, since that is the day we leave for Europe.