Sentence examples for so polite from inspiring English sources

"so polite" is a correct and usable phrase in written English.
It can be used in a sentence to describe someone's behavior or language as very courteous and respectful. Here are two examples: 1. "John was always so polite in his interactions with others, never speaking out of turn or using inappropriate language." 2. "The waitress at the restaurant was so polite, always smiling and attending to our needs perfectly."