Knowledge: Richard Wagner is Chief Justice of Canada, which is considered the head of the supreme court, while its counterpart in the US is John G. Roberts, Jr.

Conversation:
I'm about to work in the US Federal Judiciary, do you know anything about it?
That's cool! The federal judiciary of the United States comprises one of three branches of the US federal government.
Oh right, that's the supreme court right?
I am not sure if that's the supreme court, but I know that a supreme court is required by the Constitution's Article III
I see, I didn't realize it was required
Yes, the judges are appointed by the President, but the Senate must also consent to the choice.
Oh wow, what does the Supreme Court do?
The Supreme Court is considered a last resort court.
Who is currently the head of the supreme court?

Response: John G. Roberts, Jr. is currently the Chief Justice in the US, which is considered the head of the supreme court.