Dear Mr and Mrs Collins,
I hope that this letter finds you well. I am writing this letter to apologize for being out of the country; as a result, I will not be able to attend the birthday party.
First, I think that Chris will appreciate this surprise because he has always liked to surprise others during their special events. In addition, he has been busy at work for a long period, so he will enjoy spending time with friends and relatives.
Secondly, unfortunately, I will not attend this party as I will be in my birthplace for a month, and I will come back a week after the birthday. I am going to spend some time with my grandparents.
Lastly, I last saw Chris two month ago, and I really miss him; as a consequence, I will visit you after coming back to have dinner together. What is more, I will bring him a special gift from my old town.
I look forward to hearing from you, and if there are any updates, please feel free to contact me.
Yours sincerely
Ali Ammar
