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: Barry was getting dressed for an important dinner event. Sentence2: He struggled to tie his tie properly. Sentence3: He had to call his dad to ask him what he was doing wrong. Sentence4: Barry's dad walked him through tying the knot over the phone.
In the end Barry had a perfect knot in his tie and looked great.