Look for comma splices and fussed sentences.
Dear Ms. Smither,
Thank you for speaking with me about the position of Accounts Payable Manager, I Enjoyed meeting with you and the members of your team I am excited to work with such a great team. This job fits my qualifications I work independently and am a self starter. I feel strongly that i will be a great contributor to your firm I hope that you agree. Thank you for your time and consideration I look forward to hearing from you.
Sincerely,
William R. Jones