题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1. 每处错误及其修改仅限一词。

2. 只允许修改10处，多者（从第11处起）不计分。

Dear officer，

I am writing ask for your help. I take flight CA983 from Beijing to Los Angeles yesterday. I left a black bag on my seat because of my careless. There are many important things in it, include my passport, credit card and $1,000. And the most important thing is my notebook, that has all my clients' phone numbers.

Though this bag is very important to me, my friends advised me to write to him. Hope you can help me find out the lost bag. I will real appreciate your help. If you get any informations about my lost bag, please contact me at 800­4006­2121.

Yours faithfully，

Will Smith