@Phuc0 "What do you do when you get inappropriate requests? "
" I'm sorry, but you must have missed seeing that the maximum guest count for my listing is 2 guests. I cannot accommodate more than 2, my insurance does not allow that. You should withdraw this request ASAP so you will be free to look for a listing that meets your needs."
If you can get them to withdraw the request before the 24 hour window runs out, you won't have to decline.