Hi kellyw thanks for posting your question. In short there is not an easy way to do this if you are wanting a constant scroll with the text from what they are saying if that makes sense like you see on TV Shows or the Stock Markets.
However, if you are referring to a Lower Third that has their name then that is possible and fairly easy to accomplish. Or you could use Closed Captions if that is what you would want and if not could you give an examples of what you would like or a link to a video showing it ?
I am sure with a lot of work if you want the text to scroll at the bottom constant then it could be done with some work but not just a one click easy and done thing unfortunately. Hope this helps and let us know. Have a great day/night. :)