Happy to hear from Fem/Doms

I need help from Fem/Dom Mistresses... Are you polite when you want your submissive to serve? My Mistress uses 'Please' and 'Thank You' more often than I think she should. Her phrasing is more like a request than a demand. She will say 'will you' versus 'you will'. I know she wants me to serve but when she offers me options, I feel inclined to 'opt out'. Any comments appreciated and thanks in advance.