salesperson
US /ˈseɪlzˌpɝː.sən/
UK /ˈseɪlzˌpɝː.sən/

1.
a person whose job is to sell products or services in a store, by telephone, or by traveling to customers
:
•
The salesperson helped me find the right size.
•
She works as a salesperson for a car dealership.