I don't have any stories of my own. Can I make up stories to tell for my presentation? You could. But it's really hard. That requires a lot of creativity thinking on your feet. That's hard.
My advice for most people is just retell an actual experience that happened to you. What did you say to someone else? What do they say to you? What was the problem? Where were you? How do people feel about it?
How was it resolved? That's all the story is don't overcomplicate it, and like telling your own stories, it's going to come across more genuine, it's going to be easy, much easier for you to tell, and it's going to come across as insincere to your audience. The Key of course, is the story has to be 100% relevant to the audience. They have to understand the message behind the story. It can't just be a funny thing happened to me on the way to work today. It can't just be sure Sharing your life there has to be a purpose.