怎么用英文跟同事say hello

Dear **

I am the new admin assistant. My Chinese name is ***. It is really nice to work with you all. You could come to me when you have met the admin issue. My contact is as belowed.... Thank you.

dear ***
我是新来的行政助理***，我的中文名是***，很高兴能与你们共事，以后大家有关于行政等方面的事情都可以来找我，我的联系方式如下，谢谢
Dear***
I am the new administrative assistant,my Chinese name is***,I am so happy to work with you,if you have any problems on the administrative,you can come and ask me,the way to contact me is below,thank you!

dear***
I am administrative assistant *** which comes newly, my Chinese name is ***, very happy can work together as colleagues with you, later everybody will have about aspect and so on administration matters may come to look for me, my contact method is as follows...thanks