I humbly wish to apply for the position as an Office Assistant in your reputable organization.
I believe the skills and experience I have to offer in this respect will prove to be considerable benefits to your organization and also have basic computing skills.
I have excellent team-building and interpersonal skills and have the ability to fit and blend into a team atmosphere quickly and seamlessly. 
I would like to take this opportunity to thank you for considering me for this position and I look forward to the chance  to expand on my qualifications, experience and skills at interview level 

Thank You.
Yours faithfully
Chiamaka Shirley Chikwendu.