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.
Q: Sentence1: Oliver needed a new radio. Sentence2: He didn't know anything about them, though. Sentence3: He had a friend help him pick one out. Sentence4: The friend was a pro and found him a good deal.
A:
Oliver was grateful to his friend.