Hello Ranbir Kapoor,
You may not 'like' or 'want' this, but I think you 'need' this response.
But before I go into my response to your posting, I suggest you go thru the recent thread mentioned below, taking ONLY--repeat ONLY--the essence/spirit of the thread vis-a-vis your problem/posting:
https://www.citehr.com/411361-advise...ng-letter.html
Coming to your 'urgent need', I am not sure of how your recently becoming the HR manager is linked to the ability to draft the letter you want. Do you mean to say that the ability to draft letters comes in any specific timeframe AFTER becoming the HR Manager--for you or anyone?
There's a beginning for any skill--whether writing/drafting the letter you mentioned or for even the simple act of cycling or running the right way. Unless one makes the beginning/start, there's no way he/she will ever learn that particular skill. And mistakes/errors are a part of that learning process.
By asking for a spoon-feed [despite Dinesh V Divekar suggesting you to FIRST make the attempt & THEN ask for advice/suggestions], you are only causing YOURSELF more harm than good in the long-term--NOT anyone in this Forum.
You have also not answered Dinesh V Divekar's query reg the performance appraisal mechanism in your company. Maybe the answer to YOUR query lies in answering his query?
Coming to your comment "I m trying myself also bt can't get it", all one can say is: it just means YOU HAVEN'T TRIED ENOUGH. There's NOTHING--absolutely nothing--that one can't get/learn--it all depends on the effort. I remember reading in news a couple of weeks back that the son of a Bihar coolie/labourer cleared the Civil Services Exam this year. How is that person superior to you? I am sure you too can identify similar examples yourself.
Hope you got the point.
How to take this posting--including labeling this posting/response as a
'bhashan'--is upto you.
All the Best.
Rgds,
TS