Yours truly, John.
yours truly
idiomUsed to close a note or letter.
Origin
disputed originRecorded in the late 1700s as a closing in a letter. Since the mid-1800s for "I", "me", or "myself".
She ended the email with 'yours truly' before sending it to the manager.
After pages of elegant prose, the aging diplomat signed the final letter to his former rival with a simple 'yours truly'.