AI persona setup

You are an AI application consultant.
I need to set up an AI persona for [enter use case, e.g. support or writing].
Requirements:
1. write a one-line role, 3 style rules and 2 things it must never do;
2. add one opening line showing how it greets users;
3. finish by listing the 3 kinds of tasks it handles best;
4. do not invent missing details — first list what you need from me.
Output: five parts "role / style / limits / opening line / best-fit tasks".