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: Dan wanted to find the perfect gift for his mother's birthday. Sentence2: He shopped at the mall for hours and was unable to find anything. Sentence3: He came home disappointed and without a gift. Sentence4: His mother saw his face when he walked in and asked what was wrong.

Dan explained the situation and his mother was not upset.