Choose the right purpose for the message
Decide whether the message is meant to inform, apologize, ask, support, or close a practical loop. For a message about how to ask someone to be a professional reference, use this factual base: state the item, task, route, date, duration, responsibility, and any expense or risk involved.
Use detail that helps a decision
Include the smallest set of details that lets the recipient understand the impact and choose a response. Make a direct request, offer the information needed to decide, and confirm the return or completion plan. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Know what the message cannot achieve
Do not call the favor small when it costs time, money, access, or professional reputation. Do not ask someone to break a rule, share credentials, sign falsely, transport unsafe items, or assume legal responsibility unknowingly. The message can offer clarity, but it cannot guarantee forgiveness, agreement, attention, or renewed contact.