You will be given a definition of a task first, then some input of the task.
In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.

Sentence1: Jane was working at a diner. Sentence2: Suddenly, a customer barged up to the counter. Sentence3: He began yelling about how long his food was taking. Sentence4: Jane didn't know how to react.
Output:

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
Luckily, her coworker intervened and calmed the man down.