Well depends on the job. But, what I would say is something like..
“Hello! My name is ____, and the reasoning of why I applied was because one, I’m very helpful towards people. I love to communicate, and offer any help that I can. Two, I have really good memory. I can remember a lot of people, objects, and placement. Three, I’ve experienced working at a place that’s like this. I had to quit though because of _____.”
Hope that gave you an idea.