Draft of E-mail to Seniors for Permission to Work in HR Department

hi every one ...
i need your help urgently,i have hr experience but im working as a front desk officer .actually there are 2 partners one of my boss hired me hr executive + front desk officer when i joined 2nd boss email me i will review your job description after 3 month now you you have to perform FDO with 0 involvement in hr activities.i have completed 5 month but my 2nd boss not answering me..please advise how to write effective email to boss for change my JD and request for hr work.or should i leave this job because im 2 master and 3 years hr executive experience but now me doing job just FDO... and my boss dont want to listen me

Dear Mubbara,
You may use the following draft for your e-mail:
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Subject: Permission to Work in HR Department
Dear Sir,
As you are aware, I am working in _______ (name of your company) since ________ (date). I had applied for the post of ________ (name of the post) and my interview was also conducted for the same post. Nevertheless, on my selection, Mr ________ (name of the partner) sent me mail asking me to handle dual role of Frond Desk Officer (FDO) and also as HR Executive. Though I started working as FDO since _______ (date), I am yet to get chance to work in HR Department.
Sir, while placing me at the job of FDO, I was told that I will be shifted to HR Department after three months. Now five months are over since I started working as FDO. Therefore, I hereby make earnest plea to restore my placement at the HR Department.
I have completed _____ (your qualification in HR) and thereafter have acquired experience of three years as HR Executive. I wish to pursue my career in the field of HR. However, there is a mismatch in my career ambitions and the work that is allocated to me. Compatibility of present work with that of past will keep me motivated. Prolonged interlude with non-HR activities is not conducive for my career. Hence this request.
Regards,
________ (your complete name)
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Thanks,
Dinesh Divekar

thank you so much sir...i really appreciate your kind response