紧急求助，请教英语高手，在线等，谢谢！！！

Dear All,
I have finished the hand over today and will work by myself from tomorrow.
Thank you for providing me this opportunity to work with you, I will work hard and do my best on daily work.
For your convinence, my MP: XXX
Yours,
xx

Dear Mr.××,
How are you? I am ××, a new member of this company. I am glad that I have this opportunity to work here. Please allow me to express my sincere appreciation to you for your giving me this opportunity. Today is the first day of my work and I have already finished the handover task. I will work hard and try to make some contribution for our company in the following years. My phone number is ××, please allow me to ask you for help during the work in the future. Thankyou very much!

best wishes!
××

I've already finished the hand over and take over with the predecessor, and he/she is gonna leave today, thank you for giving me this opportunity, I will do my best from now on, won't let you down. My phone number is *****, please feel free to call me

Best regards,
Tom(这里写你的名字)

The first day of work, and former handover finished, former will leave today. I want to send an E-mail to superiors (those who interviewed me) probably means said thank you thought they gave me the opportunity, work has been finished handover, later how how. And then told them my cell phone number, and so on.

Hi all,

I have finished the job delivery for my last job and get ready to the new job.
Thanks a lot for giving me this opportunity. I will try my best to do the job well.
I am sure I am the right guy to do the job and I won't let you down.
My cellphone NO. is XXXXXX. You can get touch with me though this NO..
Hope to hear from you asap.
Thanks and best wishes,
XXX