Hair stylists are responsible for much more than simply cutting and styling hair. They must schedule appointments, provide advice over the telephone, give consultations, work with clients to find a style that meets their wants as well as their needs and much more. As such, your employer will want to ensure that you are capable of multitasking. "I was once the only stylist available to answer the phone, work with clients and restock supplies. In this situation, it is important to assess the needs of the clients first and perform other tasks in between as needed" is a fantastic answer. It shows that you will always put the needs of the clients first, but that you will not forget your other duties.