I recommend being as pleasant as possible and not getting defensive when or if they ask difficult questions.

If you are being hired to the work with the public, you will have to appear to be authentically kind and interested even if you want to stomp off in anger because they're being annoying.

Also, when someone helps you, say by answering a question or by being helpful, in any way, you come back to them and thank them for their time and interest.

Basically, high levels of good interpersonal skills behaviors.