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: Lea was looking for a plane ticket. Sentence2: She thought she would have to cancel her trip. Sentence3: She could not find a ticket that was cheap enough! Sentence4: Then she found a great deal on a discount site.

Lea not only bought a ticket, she upgraded to first class too!