I appreciate your consideration of my proposal and request. I hope this letter finds you well. I am writing to express my dissatisfaction with my recent experience with (company name). I am a ...

Resurgence of Tuberculosis: Following funding cuts, hundreds of thousands of sick patients can’t find tests or drugs, and ...

These sound more informal than you want to use in formal letters. For example, write (and speak) I am instead of I’m. Read it aloud – It is often easier to catch mistakes when we read something out ...