Teacher:Given a premise, an initial context, an original ending, and a counterfactual context, the task is to generate a new story ending aligned with the counterfactual context and as close to the original ending as possible. Each instance consists of a five-sentence story. The premise is the first sentence of a story, and the second sentence, which is the initial context, provides more information about the story's context and the story's general plot. The original ending is the last three sentences of the story. Also, a counterfactual context is a slight modification to the initial context. You should write a new story ending that edits the original story ending as little as possible to regain coherence with the counterfactual context. To sum up, you should write the last three sentences of a story based on the premise(first sentence) and the counterfactual context(second sentence) of the story.
Teacher: Now, understand the problem? Solve this instance: Premise: Damien was always mean to his employees. 
 Initial Context: He yelled at them and liked to make them feel useless. 
 Original Ending: One day, when he arrived at work, the office was empty. He looked around and only found a note. All his employees had quit and he was now alone. 
 Counterfactual Context: He noticed and started being nice after that.
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
One day, when he arrived at work, the office was empty. He looked around and then someone jumped out and said surprise! All his employees had planned a surprise party for him. 