I don't think you declined her @Donn-And-Vicki0 if all you did was answer her, but we don't know which button you pushed. You can ask Customer Service to remove that decline if you did it accidentally. Give them about two weeks to get back to you on that. They're busy with an insane summer and your issue is not urgent.
You might want to check out Weven and see if it's a place you'd like to list your property for events. If she is asking, it's possible she will get a commission and not you? It's a little unclear. You should do some digging.
If you want your property used for events you should create a separate listing on Peerspace because it is designed for events. Don't allow events through Airbnb. You won't have any protection and as a new listing could attract unauthorized parties.