Clients should be able to add additional messages to the guest journey builder. so they can have a pre-checkin message 7 days AND 2 days in advance so they can send a message 3 days after checkin but only for stays that are longer than 5 nights so they can send a message directly after checking out so they can send a message on the morning of checkout etc. these should have at least these elements: filter (like rate type, room type, stay length) trigger (post-booking, checkin date, actual checkin time, check out date, actual checkout time, actual room cleaning time)