The Visible host for your venue is the administrator displayed on the venue profile - this should be the person responsible for responding to client inquiries.
To change your visible host, go to the Edit your space for your venue, select Admins, add a host. Click Make visible host for your chosen admin (if the host is pending, they will need to confirm before you can make them the visible host)
...and it’s done! That admin will now be the go-to person for your clients.