I have worked with different companies in the past, and am confident I can meet and exceed your expectations. I can complete your project within your budget and by the date you have specified.
I have carefully read your job description, and because I am Illustrator and designer, I am confident I can complete your job very well. I can achieve the results you are seeking.
I would love to work with you. I am excited for this opportunity. I look forward to receiving your response.