Would you please rewrite this? "Dear Sir
I was my privilege to work with you since 2011. We accomplished so many great things together. York Hospital was the last project we worked on. 

Now, I am requesting a Letter of Recommendation from you for my professional reference. I have attached a sample to this email. I am also placing a URL that describes job responsibilities of similar positions.  

It would be great if you please issue me  a Letter of Recommendation and continue supporting my professional career in future. "  Use words with all capital letters to highlight key points, but make sure that words with all capital letters appear less than 11 times
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