Most Friendliest and Courteous people you will ever see, simple we follow the below writings Gandhi.
"A customer is the most important visitor on our premises. He is not dependent on us. We are dependent on him. He is not an interruption of our work. He is the purpose of it. He is not an outsider to our business. He is part of it. We are not doing him a favor by serving him. He is doing us a favor by giving us the opportunity to do so."
-Gandhi