Epic's example for building talkative Fortnite characters puts the player on a used-car lot. Buyers can haggle, ask about extras and decide whether to close a deal. The template shows creators how to connect the conversation to what the game does next.
A language model can return prose for a character to say and structured output in fields the game can read. Epic's release notes describe using that structured output with Verse, the language creators use to write rules for their islands. A conversation can then affect the game through a defined event instead of remaining a line of dialogue.
The car lot gives a simple example of the handoff. A character can react differently to different players, while the creator still decides which outcomes the game recognizes.