Writing Precis

Madam Vanessa,

I had posted a letter yesterday about the holiday assignment but I couldn't find it on the page. I think you have not passed it. Madam, can you help me in writing Precis. Can you teach me how to write Precis? Can you tell some sites which describes completely about Precis? I have tried several sites but am not successful.

Please help me.

Bye

Rajeev