You can contact an artist through CMF using the booking enquiry form on their profile page.
The booking enquiry button is available on Pro artist profiles. Click Enquire About Booking and fill in your details and message.
The artist will receive your enquiry by email and can respond directly to you. CMF passes the message on but is not involved in the booking arrangement itself.
If an artist does not have a booking button, they may not be accepting enquiries through CMF at this time. You may also be able to find their social media or website contact details on their profile.