Branching plots for games/decision stories

I’m someone who’s interested in creating games, and due to the interactiveness of the player, there is a lot of “if the players does/says this, then this will happen”. I use third-parties to manage things, but it can get kind of messy at times. It would be really cool and a life savior to have some kind of branching feature where you can see visually the interconnected choices that the player can make to create different plot lines (with comments about when they happen, how and where). It would be even cooler if the AI can have this context. I know this is complex, but seeing that is planned would be enough for me. :D