如果您跟人家约好去做某些事情，但是你却失约了，这个需要向人家道歉，说明原因，兴许还能得到原谅，下面是关于失约道歉信，希望对您有帮助!
失约道歉信(英文版)
Dear Alan,
I'm writing to apologize about last Thursday.
I am terribly sorry that I didn't go to see you, for I lost my wallet.
Anyway, I found it.
But it was too late for the train.
I had to take the bus.
What a pity that I took a wrong one.
It went to Milford.
There, I waited for half an hour for a bus to Driffield.
It was much worse that on the way to your home, the bus broke down.
So I just went back home to Pigston.
I really do apologize because I didn't speak to you on the phone, but it wasn't my fault.
I tried several times, but there was no answer.
Anyway, how about next Thursday?
Love,
Tom
失约道歉信(中文版)
女友:
今天发生了一些不愉快的事情。
你说自己干嘛回家后非要再去那里瞎逛，逛就逛吧，为什么要到那时候说你去过那里。你自己答应的事情忘记了吗?非要别人每天每时每刻都去提醒你吗?猪脑子吗?一定要记得!!!不准有以后!!!
你要记住这是你自己做出的承诺，既然你已经做出了承诺，答应过别人的事情，就一定要做到，要不然会让人心寒，又会让人受伤。
昨天你对我说的那些话让我心里十分难过，我也自己反省了一下自己，确实这样做这件事情十分的不对，因为我没有做到答应过你的事情，我如果当时告诉你了也许就不会有这些不高兴，也不会伤到你了，本来昨天是高高兴兴的一天，然而却毁在了我的'手里。
我知道，一句对不起不可能一下就能抚平对你所造成的伤害，所以我现在需要做的事情就是用实际行动去改变一切。做一个不会再去伤害别人的人。如果再做出这样的事情来，就真的猪都不如了。
希望你在看到这一封道歉信的时候，能够不再生气，能够快快乐乐的。也希望你能原谅我这个昨天有些混蛋的我。