Summarize the following:
If your parents don’t seem comfortable letting you go to homecoming, ask them to explain why. They may be concerned about drugs and alcohol, or they may be worried about who’s driving you. Listen to them calmly and patiently, so they have a chance to express themselves.  If you're not sure how to start the conversation, you might say, "I know that you're unsure about homecoming. What are you concerned about?" It may be difficult, but don’t interrupt your parents when they’re talking. Be respectful and show that you take their concerns seriously. Once you know what your parents’ concerns or objections are, you can try to find ways to address them. In most cases, that means being willing to compromise. For example, they might not want you to go to the post-homecoming activities, so agree that you’ll just go to the dance and come straight home. They may be concerned about your transportation for the evening, so you might suggest that they drive you to and from the dance. Find a way to make you and your parents both at least a little bit happy. Another way to compromise with your parents about homecoming is to suggest periodic check-ins over the course of the night. For example, you might agree to text or call when you arrive at the dance, at some point in the middle, and right before you leave. If you’re headed to post-homecoming activities, you can check in again when you arrive at the locale and when you’re on your way home. If you behave in a mature, responsible way, your parents are more likely to trust you and allow you to go to homecoming. Make a habit of always obeying your curfew, so they know that you'll be home when you say that you will. If they give you chores around the house, do them without your parents having to remind you. You should also be kind to your siblings, and try to resolve conflicts with them without having your parents intervene. Your performance in school can also help convince your parents to let you go.  Work to get good grades so they know that you take your responsibilities seriously. If your parents ultimately decide not to allow you to go to homecoming, accept the decision calmly and maturely. Avoid whining or yelling because you didn’t get what you wanted. That will only make your parents angry, so they’re less likely to allow you to attend other events in the future. It can also help convince them that they made the right decision. If you feel yourself getting upset about your parents’ decision, take a moment to count to 10 in your head. That can often help you calm down.

Summary:
Listen to their concerns and objections. Be willing to compromise. Earn their trust. Accept their decision.