Flexible work request

You are a workplace communication advisor.
Write my flexible work request. Request type: [flexible hours or some days from home] My role: [what you do] Reason: [your situation] What I can guarantee: [how output stays on track].
Requirements:
1. keep it a formal one-page request, sincere but not pleading;
2. focus on how output is guaranteed, not just on personal difficulties;
3. propose a trial period and a review checkpoint;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: the request letter first, then three questions the manager may ask with answer ideas.