@Cynthia858 This sounds like someone with a brand new account who has no idea how Airbnb works.
Just tell him all interaction between host and guests takes place on the platform, that hosts don't ever communicate by phone with guests until after a booking has been paid for and confirmed, and that hosts and guests don't have access to each other's phone numbers until then. And that you require far more info than appears in his profile in order to accept a booking.
Anyone can send you an inquiry. It's just a way for guests to ask questions even if they aren't ready to commit to a booking. Inquiries don't require that you click on pre-approve or decline. All you have to do is reply to the message within 24 hours. Never waste declines on Inquiries.
I assume you use Instant Book, and if a guest doesn't meet your IB requirements, they have to send a Booking Request instead.
I see you aren't a brand new host, as you have 35 reviews. I'm surprised you've never received an Inquiry before. ( All inquiries are not as clueless as the one you just got)