Madam Sir - The most overused way to say hello, like your grandma tried

The most overused way to say hello, like your grandma tried to write a letter but had a stroke in the middle of it.

Dear Sir Madam, I am applying for a job because I have no idea what else to do.

Hello Madam Sir, I am writing to say I have no idea what else to do.

Dear Madam Sir, I am writing this letter because I have no idea what else to do.