Allow contacts/attendees to Cancel & Reschedule events using Meetings

This reschedule or cancel feature is one of the things about Meetings which means I won’t let go of Calendly yet. The other is the inability to book up to 12 months in advance. I need my coaching clients to be able to book in at least 6 months in advance, ideally up to 12 months. HubSpot’s timeframe is too short for me