You can replace the booking form with the owner contact form.
Go to Theme Options-Listsing Page-Listing Page Settings -> Show Contact Form instead of booking form. -> YES and Save
The booking form will be replaced by the contact form on property/listing page.
If the user is logged in, the form will look like this
If user is not logged in, the form will have optional 2 new fields for email and name
Admin can choose to enable GDPR and Mobile phone in this form as well
Emails go directly to property owner email address. If owner is admin, emails go directly to admin email.
Admin can receive duplicate copies for messages by setting his email address here