You can use special mail tags in your Contact Form 7 Message Body, here:

Full list of tags you can use can be found here: https://contactform7.com/special-mail-tags/

The most useful for single property page Message Body:

[_post_id] — Property ID

[_post_title] — Property title

[_post_url] — Property link

[_url] — Property URL

[_post_author] — Agent Name

[_post_author_email] — Agent Email