Hey I replied to this a little while ago but I'm going to do it here again just to make sure! I know it's been a couple months and not sure if you still have the same problem. But to solve it :
In the event commands box double click it and click the 'Choices' commands (not sure the exact name). it will have the default "Yes", "No" choices with choice 'No' as the canceller to close out of the message window. To make different replies, change "yes" to, "I'm fine", and change "no" to, "Not so good". And make a third choice as "Cancel" or whatever and set it as the canceller. Then in the Event Commands box it will show your choices "I'm fine" and "not so good", And under each will be an empty space. Under each space you can then add other cmomands and switches to do whatever you want for each choice. Such as making the NPC say different things or setting up switches and the like!
If you have any questions or anyone else who is reading these posts, just send me an e-mail at boobich14@msn.com