• SORRY: Process-Controller cannot achieve goal of "schedule-meeting"
  Constraint-Manager reports "over-constrained"
• SORRY: Ticket-Agent does not understand query "best cost"
• SORRY: Decision Use-IOU is inadmissible.
  Cause: the fact (IOU-2 is unavailable) is believed.
• SORRY: You do not have authority to reject decision Use-DOU.
  Only Optical-Designer can make that change.

"SORRY" is a standard performative and messages are handled like other agent messages.

"SENDER" is a standard agent message field.