is this appropriate for workplace e-mails

Question

and i was wondering if you could help me punctuate it correctly

Hi I wanted to let you know that i'm going to be a late for work on October the 28th because of a personal reason

Answer 1

Hi. I wanted to let you know that I'm going to be late for work on October 28 because of a personal reason.

You should also indicate how late you'll be.