When I was making the first quest for my mod and added dialogue views, I was hoping for my added NPC to actually say something in the game when I tried to test it. But he would rather say 'Hmm', 'Need Something', 'Yes' etc instead of the allotted dialogue.

Any Help would be appreciated.

If your quest is "Start Game Enabled" you need a so-called SEQ file for your mod. Try to google it.