i need help with this question please. ( event management)

Part Two: In this assignment, you are required to develop a communication plan for the following event situation. On the morning of the session, a well-known keynote speaker for a lunchtime presentation has cancelled due to a serious illness in his family. A colleague from a related organization has agreed to speak in his place. Tickets for this session were priced at $150 pp. due to the popularity of the keynote speaker. Your organization does not plan to provide refunds. Part 2: Information to be shared and Information not to share and How to share the info and the Who will share it, who will with who with who media publish the changes