Confession: I don't think she should be hired for the job
Basically, while she fit the profile of intelligent and polite she couldn't fit into the uniform which consists of a extremely short dress and cut off tank. Honestly, she doesn't have the body type that the restraunt is looking for. It happens. It would be like forcing playboy to hire a obese woman or make Chippendale's hire a burly, rotund, and hairy man.
here is a pic of her and a pic of a typical waitress from the restraunt.