Have you tried having separate rows for each Answer?
I know you don’t want to change too much of your current setup, but why not test this and see if it works?
I’m still not clear on how you’re getting the table data and I think you might be treating the entire table as one repository for everything you need? If you set up your table with Quest ID, Answer ID, Sound Cue field etc then you can use it for every conversation in your game. You could have a look at the quest system used in Skyrim; the modding tools let you see how the developers arranged quests and dialogue.
I think your current setup is trying to call data on one row?