What is an example of proper communication technique and professionalism when working with a customer?

An IT technician should be culturally sensitive. Some people can find it challenging to communicate their issue due to a language barrier. (Think about how little computer language you picked up in your high school language classes!) Others may follow different habits or practices at work. Be respectful of their world. In some circumstances, utilizing the proper professional titles is a sign of respect, and failing to do so is considered an insult.