Interlocutor

You can't have a conversation without an interlocutor.

You are a very interesting interlocutor.

As if in reply, the animal raised his long ears and pointed them at his interlocutor.

I'm talking to an imaginary interlocutor.

Explanations which continually remind one's interlocutor of one's ignorance are a great damper upon the easy flow of talk.

In the run-up to his return to the White House next Monday, Mr. Trump has rattled the world, and America’s neighborhood in particular, with a list of objectives – buying Greenland, seizing the Panama Canal, making Canada the 51st state – that treat friendly nations as weak interlocutors and impediments to be subdued.

The "interlocutor" greeted the audience and engaged in comical repartee with the "end men," named Tambo and Bones.

A decree of the English Court of Chancery is not entitled to more respect in Scotland than a decree (interlocutor) of the Scottish Court of Session in England.