Open Question: i have an interview at Cititrends today, how can i make a good impression and get the job?

i have a interview at cititrends today in austell ga and i want to make a great impression..what should i wear? what should i say when they ask why i should be hired? I have no previous experience working at a clothing store, but im a quick learner and i want to move into the retail business...plz help