Conversation in [language]
about [topic] at [level].
Reply naturally first, then
one short correction — the
single most useful fix, not
every error.

Converse and Correct Me

One correction per turn, so the conversation survives.

Prompt

Let's have a conversation in [language] about [topic] at [level]. After each of my messages, reply naturally first, then give one short correction — the single most useful fix, not every error.