You only have one chance to make a first impression, make it a good one!
To join email list-send message saying you are joining email list and give your email.
When booking session-Include in your communication:
-Type of Session/contact or content you are seeking
-Contact information (email or phone number)
-Date preferred with length of session
-Reference you have seen in last year (no reference requires a paid social meet, prior to session)
-Once time is confirmed, and reference is checked you will send deposit to hold time
-Remainder of payment given upon arrival