Dear Mister Chayan ,
I am writing to let you know that I couldn't make it to your class because I am sick of your teaching style. I need some days off to fresh up my mind. Once I feel better I will return to the class. I do hope that your teaching style will be better as well. would like to ask for sick leave from date 23 February 2015 to date 25 February 2015 in 3 days During my absent, I will be at home and can be contacted at 088 – 5601309