Attach a contact to a calendar item without them being an invitee on the calendar event

I often catch up with friends and have a placeholder in my diary for the catch up, but I would never add them to the invite. Please can we have a feature in Dex where I can attach a contact to a calendar invite (in Dex), without that person being an invitee in the actual calendar invite. OR if a name is present in the event title or description, could Dex automatically match it to a contact so that I get the pre-meeting briefing!