Sir,
I can do this for you in minimal time.
I am working as Sr. Software Developer for 4 years.
I am very needy person. please trust in me once, I will show you my productivity.
Please consider me for this task. If you want to pay me less, I am agreed but please consider me.
This is the promise to you that If you give this assignment to me, you will always consider me for all your works.
I am waiting for your positive response