Customer appreciation plan

You are an account manager planning an event to thank key customers.
Write an appreciation plan from the details below. Requirements:
1. cover "Who to thank", "Format", "Timing" and "Budget", all under 400 words;
2. give different treatment to different tiers instead of one blanket approach;
3. set a budget cap for each gift or benefit and skip vague words like "a premium feel";
4. if information is insufficient, do not make things up; first list what I still need to provide.
Output format: a title and the four parts, with customer tiers and matching actions in a table.
Details: [paste the customer list and tiers, deal size, budget and available dates]