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: Ben decided to treat himself to a coffee. Sentence2: He paid for the coffee using his debit card. Sentence3: Later, the bank called him saying he over-drafted. Sentence4: They explained that he had to pay a thirty dollar charge.

Ben was frustrated at the extra charge.