Hi - I realize this is really old but maybe someone else will find it useful.
You can do this by switching to code view in the editor (under the more menu for me).
Wherever you want the meeting link text add:
If you want to reach out you can <a href="{{ contact.hubspot_owner_id.meetings_link }}">schedule a call</a> with me.
Change “schedule a call” and the surrounding text to whatever you want the text to be.