So I just got a job offer with a company I really wanted to work for, and beforehand the person who will be my immediate superior told me to text me when I got the offer to let him know whether I was accepting it or not (on top of "officially" accepting it via signing the letter they sent me and emailing it back). I'm not really sure what the etiquette is for something like that. What should I say? It just feels weird to be very formal in a text but at the same time I don't want to just send something like I would to a friend. Thanks for any advice.