Quest uses templates to handle default responses, allowing it to be translated into other languages - or into third person in your case. There is a section on templates here:
http://docs.textadventures.co.uk/quest/guides/The general strategy is to display library elements, go to the advanced section, and select the templates (and dynamic templates) you want to replace; copy them into your game (Quest has a button top right to do that for you, as long as you are using the offline editor), then you can modify them how you like.
Kind of a brief overview, hope that is sufficient!