I was trying to change the DialogueUI but ... I can't.

I've a DialogueSystem with two diferent DialogueUI as childrens (One of them is disabled). One is the Jrpg template, and the other one it's personalized.
I need :
-Start a conversation with the JrpgTemplate. (There's no problem)
-When conversation is finished, load another level.
- In the new Scene, swap the DialogueUI (Jrpg to personalized) and then a DialogueSystemTrigger starts a new conversation in this scene with the personalized DialogueUI.
I'm thinking on create a new script, and make something in the Start method... like:
// change DialogueUI from Jrpg to personalized; <-- How?
DialogueSystemTrigger.OnUse();
That's all, thanks!