Dear Peter,
How are you doing,and how was your birthday?
I apologize that I couldn't attend to your birthday party last night.I was sent abroad on a difficult assignment by my superior accidently yesterday.I know I should have told you about it,and I know that I let you down badly.But I really didn't have time to make a phone call,and this assignment is highly classified.I was shocked when I got the message to the overseas.I tried very hard to get rid of it,but I couldn't.You can hardly imagine how much I miss you.I haven't seen you for about two months,I wanted to see you eagerly just like a cat on hot brick.But please trust me,your birthday is stamped in our memory,and I will never ever forget it in my life.I'm trying to work hard is only because of you,I want you to live in a world of perpetual happiness.I want you to be my prince.
My darling,I will be back home after two days,and I promise I will bring the birthday present to you.You will be really surprised.
Love you
Emily