Dear Sir / Madam,
I have written screenplays for personal use for many years so it would be an honor to me to write one for you. I am a very creatively thinking person with lots of new ideas and a good knowledge about screenplays, I work fast and efficiently and have high language skills. Besides screenplays I have written fictional stories, personal essays, travel articles and I run a blog. I am very dedicated and will not leave you dissatisfied.
Thank you for your consideration.