I'm currently a freshman and I found out through my ALO that there's going to be a presentation from the AFA at our school tomorrow. I was wondering if I should address the presenters as sir or ma'am and integrate that into my speech. However, I live in California, where everything's fairly casual, and because of this, I have very little experience in using sir/ma'am in my sentences. So, should I say it and risk sounding like my responses are "canned", or not do it and just be formal otherwise? Thanks for your responses.