please help check the letter,thank you very much!

Dear,
it's been a while since we contact with each other. is everything going all right with you? Are you in Beijing office as well? Or, you have gone to Hong Kong?
Something has changed, as you know Mark is one the vacation, and now, Menfis gives me all the task.
If you miss holand food, please feel free to tell me, i can bring it to beijing when i go there.

ear ***,
这个是dear....

Long time don't connect这句话看着不对，看是说不准

Mark have been to vacation你难道是想说mark旅游过？mark gone vacation.Mark去旅游了

holand大写啊H

missed 换成like 或 want 更好些

please free to tell me -- please tell me when you free

有点中式英语的味道...

开头是dear。你是不是少打个d
第一段第一句是long time开头，是不是应该写成Long time haven't connectted（这里的联系是不是用seen也可以)
第二段第一句是过去式,那后面的Mark..就应该是过去完成式
Mark had been to vacation. 后面那个Menfis是人名的话.give应该用单数第三人称后面加s.
第三段第一句是不是改成if there had some food from holand you missed...然后是I will take it..

it's