Sir,
I am applying for the job position of Office Manager as clearly advertised. 
I am 45 years old, and have experience in administrative duties for an upwards  of 10 years now. 
I majored in Business Administration and Management. And hail from Buguma in Asari-Toru local Government Area all in Rivers State and have proven inter-personal skills and communication proficiency, having worked in various fora. 
Therefore, given the opportunity I promise to be efficient and productive in my responsibilities according to the tenets of the organization.
Thanking you exceedingly for your consideration. 
Faithfully Yours
Edwin, Jubilee D.