Why? Its just a machine. You're trying to find the right buttons to press to get it to give you the desired results. The "person" is just part of the interface.

Why? Its just a machine. You're trying to find the right buttons to press to get it to give you the desired results. The "person" is just part of the interface. They have no choice at all what to say. If you saw that a soda machine always dispensed a Coke when you pressed the Dr. Pepper button would you feel bad pressing that button to get the Coke you wanted?