Sometimes it happens that an invited Room or resource declines the invitation (for example due to the fact that the capacity of the room would be exceeded otherwise). Since the room is moore important then other invitees (you could end up fighting with some other party who also think they have a legit reservation for the same room as your party), the fact that the room hase declined should be more emphasized. Best it to display an icon of some sort (like exclamation mark) as an overlay over the meeting in the chair's calendar view.