Definition: 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.
Input: Sentence1: Margaret had an ultrasound scheduled for her pregnancy. Sentence2: She arrived at the office on time. Sentence3: Then she tried to check in. Sentence4: There was a problem with her insurance.

Unfortunately, the appointment had to be postponed.