I'm one of those customers that actually really hate open-ended questions... I think I'd much rather appreciate an MA that approaches me first and asks if I need help, and if I say no, then to back off. Sometimes I do have questions and I appreciate when they approach me first so I can ask those questions instead of me having to flag them down.

I like this line because none of the MAs ever offer to put things on me. I think with trying things on, more people are in tune to make a purchase:
"I'll check back with you in a few minutes if you'd like (me) to try something on (you)."