The act of an agent communicating (service provider, social media, etc) their departure of a previously reserved service (e.g. flight check-in) or place (e.g. hotel).\n\nRelated actions:\n\n CheckInAction: The antonym of CheckOutAction.\n DepartAction: Unlike DepartAction, CheckOutAction implies that the agent is informing/confirming the end of a previously reserved service.\n* CancelAction: Unlike CancelAction, CheckOutAction implies that the agent is informing/confirming the end of a previously reserved service.