I have never worked in a job like that but my mom was a waitress in a popular cafe in our small town for a few decades. She taught us to always be patient and kind to anyone in those kinds of jobs. My wife and I have drummed it into our kids heads too.You can always tell when a customer has worked a customer-facing job before…
They’re patient, polite, and quick to thank you because they know firsthand how far a little courtesy can get them...
Spent my apprenticeship in repairing 'white goods' (washers, fridges, freezers) and worked on residential a/c till present day, so always installations and service calls at the client's place, and over the decades you meet a wide variety of people and characters...I have never worked in a job like that but my mom was a waitress in a popular cafe in our small town for a few decades.
She taught us to always be patient and kind to anyone in those kinds of jobs. My wife and I have drummed it into our kids heads too.