Dear future partner,
I read through the job details extremely carefully and I am absolutely sure that I can do the project very well. I am very excited to work with you. I have worked on similar projects to what you are looking for, and I am confident I can exceed your expectations. I am promise I able to complete your task on time and within your budget.
I would love to work on your project and hope to hear good news from you.
Sincerely,
Wen