Dear Sir or Madam,尊敬的先生/女士：
I was a passenger on Flight FL753 of your airline from Shanghai to London yesterday and I am writing to report the loss of my wallet.我是贵航空公司昨天从上海飞往伦敦航班FL753上的一名乘客，我写这封信是为了给我的钱包挂失。
I clearly remember it was with me immediately I boarded the plane. However,on arrival in London,I found it gone. I guess it must have slipped out of my pocket during the flight. It is a black leather one with around 200 dollars,my ID card and 2 credit cards in it. Along with the items mentioned above,the wallet contains a family photo. As you can imagine,these matter a lot to me.我清楚地记得当我登机时它就在我身边。然而，当我到达伦敦时，我发现它不见了。我想它一定是在飞行中从我口袋里滑出来了。它是一个黑色的皮制钱包，里面有大约200美元、我的身份证和两张信用卡。除了上面提到的物品，钱包里还有一张全家福照片。你可以想象，这些对我很重要。
Did anyone happen to find it? Please email me at lihua@gmail.com.有人碰巧找到了我的钱包吗？请发邮件至lihua@gmail.com
Thank you for your time and support.感谢您的时间和支持。
Yours sincerely,谨上，
Li Hua李华