In this example, the scenario will be the fact that I have started high school. I believe that because of this, my curfew should be different. This is an example of a dialogue that would discuss this:
Me: "Mom, dad. I want to talk to you."
Parents: "Sure. What is it?"
Me: "But please, listen to the end. I was just thinking that maybe I deserve to have a later curfew now."
Parents: "Ok...."
Me: "It's just that, now that I have started high school, I really feel mature enough to manage my own time. I think that school's is going to be much tougher and I will have more work. So I also deserve more time to relax. And if my curfew is different, then I will have more time to do the things I want."
Parents: "Well... we'll think about it."
Me: "Please, consider it. I will also be making more friends, and spending time with them is also important. I promise I will take care of school and my grades."
Parents: "Ok, let's try it for a month, and see how it goes."
Me: "Thank you!"