Clarify the agreement that existed
Identify the promise, policy, schedule, ownership, or shared understanding that applies before assigning blame. For a message about how to reschedule a date without losing momentum, use this factual base: refer to what actually happened, what you want now, and any personal information relevant to informed consent.
Resolve the next dependency
State what is complete, what remains disputed, and which action would move the situation forward. Make one clear invitation or boundary and leave room for a different pace or a no. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Document without threatening
Do not flood someone with messages, demand exclusivity, or use vulnerability to create an obligation. Meet safely, protect personal information, and stop contact when a refusal, block, threat, or deceptive identity is involved. Keep a factual record and describe only remedies you are entitled and prepared to use.