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: Lou really wanted a pet for Christmas. Sentence2: He begged and begged his parents to get him one. Sentence3: On Christmas day, he was disappointed to see no pet in sight. Sentence4: He sadly opened his first, wiggling gift box.
A puppy popped out and started licking his face!