Persuasion starts with what they care about, not what you want. Find their reason and hand it to them.

Arguments usually fail because they are built out of the speaker’s motivations. You explain why this matters to you, at length, to someone whose situation is entirely different and who has been waiting for the part that concerns them. Finding the version of your request that serves their interests is not manipulation; it is doing the work of translation.

Write down what the other person is trying to achieve or avoid before your next ask. Lead with that rather than with your case. If you cannot find any version where they gain something, you may be asking for a favor rather than making a proposal.