My duties have not changed after the promotion.

I worked part-time as a senior sales assistant in a small food-truck company. My basic duties were providing customer service, specifically selling and sometimes preparing onigiris as well as keeping the customers informed of any available bargains. I was also responsible for setting the truck up, maintaining cleanness and closing the booth after each day of work.
During my work I had a constant contact with various types of people, thus I managed to develop excellent social and communication skills. In future job I will do my best to make good use of them!