Dear all,
My boss has reviewed our salary and rise a little percentage of our pay. So i would like to write Thank you letter to him. My writing need to be nice and correct.

as he is a british. So please read my draft letter below and could you please correct my English.
Dear ***(boss),
Thanks for your kindness, sir.
It is very helpful for us.
Under your supervision within three year, this is the third time pay rise for us. In addition, we’ve lots of supports during Nargis and had chocolate presents from returning trip. It’s obvious that you are the one who is mentor, kind and ** (always give priority to his staff), generous. We are lucky that we have that kind of boss like you.
Thanks in advance.
Naked chef