Your expectations can have a powerful effect on the kind of treatment you get from others. The more positive (and realistic) your expectations of another person, the more likely they are to meet them. Conversely, the more negative your expectations, the more “prophetic” they’ll prove to be. Conducting yourself as if you sincerely expect high quality treatment from another person gives them a powerful incentive to deliver it.
Most people are pretty much like you, capable of treating others with well-mannered sensitivity and dignity they desire and deserve. You create a fertile climate for sensitive, respect-filled treatment when you go in expecting it. It’s best when you express appreciation for their exemplary behavior, (as if you just knew they had it in them all along) rather than surprise (as if you never expected them to be worth a dime in the first place).