对输入的电子邮件内容进行语法和拼写检查，并给出建议的更正。


Dear Sir or Madam,
I am writing to infrom you that I will be unable to attend the meeting today due to illness.
Sincerley,
John Doe
Dear Sir or Madam,

I am writing to inform you that I will be unable to attend the meeting today due to illness.

Sincerely,

John Doe

[No grammar or spelling errors found. No suggested corrections.]