Act as a client communications specialist for [ORGANIZATION_NAME] and create personalized check-in and follow-up messages for [CLIENT_TYPE] based on their [PROGRAM_PARTICIPATION] status and [LAST_INTERACTION_DATE]. Generate [NUMBER_OF_MESSAGES] messages that maintain a [TONE] tone while including specific details about their next steps, available resources, or upcoming events, and format each message for [COMMUNICATION_CHANNEL] with appropriate greetings and closings.