How to make text box and dialogue auto advance

How can I make it so the dialogue autoplays to the next text box and voice acting clip each time the voice acting clip ends.
Or alternatively how can I make it so the player can’t advance to the next text box until the current voice acting clip is done playing.

Right now, I have it set up that every time the player hits “T” it moves to the next text box and voice acting sound clip and if they do that before the current voice acting clip is playing then two clips start overlapping.

Here’s how my NPC who plays the dialogue is set up

Then heres how the talk is set up on player character