Dear Hiring Manager,
I'm very interested in your job post. I have experiences of Photoshop.
I have created some logo and icons on Photoshop.
I believe my skills would be ideal for your project. I'm ready to do your job and guarantee to complete it well in two days.
I'm available to chat by IM, email or Skype, and would be happy to set up a convenient time to discuss the application.
Regards,
do-nhuan