Make room for the other version
Ask what the other person understood before assuming that you are arguing about the same facts. For a message about how to ask someone to lend you their car, use this factual base: state the item, task, route, date, duration, responsibility, and any expense or risk involved.
Correct the record precisely
Correct only what you can support, acknowledge any real impact, and propose a practical way to prevent repetition. 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.
Agree on a testable next step
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. Do not recruit an audience, publish private evidence, or turn a misunderstanding into a campaign about character.