Hello,
Let me introduce myself, i'm a young freelancer willing to work as hard as i can to acomplish exactly what you're looking for. I will not rest untill i've completed your request, and as a matter of fact, i won't be finished untill you're completely satisfied with the results of my hard work.
Now that you've got an idea of who i am, let me offer you something.
I'll work with you for a lower cost that anyone else, and complete the job as fast as i possibly can, always keeping quality as a priority, if you leave a possitive review by the end of our deal. Only if you like my job, of course.
I am a new freelancer and i understand i must prove myself first, i hope you can help me do so.
Now that you're read what i wrote for you as an example of a good short story to get your attention, tell me, when do i start, and what do you want me to write about?
I'll be waiting for your response, thanks in advance for reading my request.