You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Solution: I (myself), Dog
Why? There is only two characters in given story, i.e., I (myself) and dog.

New input: Sentence1: While walking down the street, Ramona found a wallet in the grass. Sentence2: She opened it and found the ID of a man named Jack. Sentence3: She searched the internet and messaged him about what she found. Sentence4: They ended up emailing a lot in the days before they could meet. Sentence5: When she returned the wallet, he asked her out and they fell in love!
Solution:
Jack, Ramona