RPG Quest Dialogue Generator

Write dialogue for an RPG side quest NPC.

Setting: [FANTASY / SCI-FI / MODERN]
NPC role: [MERCHANT / GUARD / HERMIT]
Quest hook: [ONE LINE]
Player tone options: friendly, neutral, aggressive

Output:
- 3 opening lines from NPC
- 2 player response branches per line
- 1 quest completion line
- Keep each line under 120 characters for in-game UI