Change register without changing the boundary

Rewrite [MESSAGE] in [LANGUAGE] for three contexts: a close peer, a new colleague, and a public service desk. Each version must preserve the same refusal or boundary [BOUNDARY] and the same factual details. Provide a phrase-level comparison of what changed and a one-line check for unintended softness or harshness. Do not invent rules about a whole culture from these examples. Verify that no version implies consent or commitment absent from the original.