Given the task definition and input, reply with output. 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: I was working hard on my laptop in my home office. Sentence2: Suddenly, I heard a loud noise. Sentence3: I look out my office window. Sentence4: And, I saw a salesman. Sentence5: Because I didn't need anything, I went back to work.
I (myself), Salesman