Dear sir/madam,
After looking at your project specifics i think i can provide the virtual assistance that you need.
As for my skill set, i'll be happy to participate in any sort of evaluation you may need to apply on me, in order to prove myself capable of performing the task.
Please feel free to contact me in order to find out more about me or my skills set.
I'm looking forward to delivering high quality output for you and creating time within your organization.
Yours Faithfully,
Victor Torres
Your workload relief