First of all , my compliments for clear , concise and detailed requirement statement .
I did not find any attachment as mentioned by you and hence can't enclose a sample.
However, I can deliver the translated content in flawless Hindi without any grammar, spelling or syntax errors.
I may mention that writing is my forte and I enjoy weaving the magic of words.
I am equally well versed in Hindi as well as English.
I personally write both prose and poetry in both languages. Also, when I was working , I have done a lot of writing for company journals and PR publications and also ghost speech writing in both English and Hindi.
Delivery on time is guaranteed. Just like you , I am looking for a long term association.
Having considered the above, if you choose to offer the work to me, I assure you of great quality and prompt delivery
I look forward to working together and having a fruitful, mutually beneficial long term association.
Thanks & regards.