请大家帮忙写封英文的道歉信 急用啊 呜呜呜!YOU were invited to attend a friend's birthday party.However,due to an unexpected event,you were not able to be present.Please write a letter of apology to your friend for your absence.意思翻译为：你被邀请参加一个朋友的生日派对 然而由于突发时间,你无法出席.请写道歉信给你的朋友为你的缺席.

dear XXX,
I’m terribly sorry that I didn’t attend your party which I had promised already.I really wanted to go.How is everything going?I’m sure that the party was exciting and you had a lot of good to eat,huh?
It's such a pity that I couldn’t enjoy it with you.At that day,someone told me that I had to finish (…..您来填写).I couldn’t help expecting to get away of the mess and to rush to the birthday cake.
Anyway,I want to say,happy birthday to you!And… your present!Though it’s still here,but we will have a good time next time when I see you.
yours,
你的名字
月 日