Given the task definition and input, reply with output. 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: Al wanted to go to his friend's party to find a girl to date. Sentence2: But his dad insisted he stay home to mow the lawn instead! Sentence3: Angrily, Al went out front and began to mow. Sentence4: He was interrupted by a pretty classmate, out walking her dog.
They chatted for a few minutes - and then she asked him out!