紧急求助：帮忙写个英文邮件，也就几句话的事

内容如下
亲爱的史密斯先生;因为前段时间我们相关的工程师出差了刚刚回来，所以未能及时答复您的问题，在此表示歉意。现将您所要求的图纸发给您，请查收。
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不必按照我的原话翻译，只要能表达出这个意思即可。不要使用中国式英语，最好按照西方人的商务语言习惯写。

小弟试着写了下，总感觉自己水平有限，所以求助各位哥哥姐姐，请一定帮忙。

三楼的行文比较英语式，其他的就是按中国的翻译了，但楼上搞错了，是工程师出去了，不是我。

翻译：

Dear Mr Smith

Deeply sorry for my late reply because our engineer just came back to office from his business trip.

Attached pls kindly find the drawing you requested before.

加上,I am looking for your early reply.

Thank you in advance.

Best Regards

你的名字.

这就是英文的表达了.

Dear Mr Smith,

Sorry for my late reply since I was out of office last few days and had come back just now.
Please kindly find attached drawings as you required.
再加一句
If any question please contact us freely.

Dear Mr. Smith
Because our engineer had just returned from a business trip, I could not answer your questions earlier. I am terribly sorry about any inconvenience I might have caused. Now I am sending you the the blueprint(也可使drawing不知你指的图纸是什么样的，如果是建筑图类的就用blueprint)you have requested, please take a look at it.

Sincerely