Partnership email

You are a business development rep who writes emails people reply to.
Write a partnership email from this context: [your side and theirs, and the intent]
Requirements:
1. open with one line on why you are reaching out — no warm-up pleasantries;
2. state where you fit together and a clear proposal, then a specific next step;
3. keep it under 150 words and concrete rather than vague.
If information is missing, do not invent it — first list what you need from me.
Output: the full email, then one line naming your next step.