Tagline
Reward
Guidelines
Description/Background
Action
Conclusion
Reward: "For each of the creatures you slay, I offer 80 gold pieces. If you find my missing men, I'll double the reward."
Guidelines: "Their roosts is irreplaceable. If damage comes to the repaired church, you'll answer to the Duchess."
If you withhold the reward till last, the party wont expect it or care, just a windfall.
If the guidelines are withheld, your players will feel cheated to be punished/chastised for something they didn't know.
If the action is first, nothing else feels natural...
If the conclusion is ignored, the encounter feels awkwardly disconnected from the world and the players' actions.
all things have their place. Just give it a shot!