Talk about your social skills, your fashion sense, and any volunteering experience you have gained! For example, say that you're good at talking to people and is patient (so you can help customers). You're an energetic person and open to learning new things (to show potential). Additional skills can be something you think will be beneficial to the specific job position. Say, you're a good leader and is very organized, or something like that.
Just remember, say what your strong points are (and support them with an example situation or a course you took or volunteer experience if possible). Wish you all the best on the job! :)