SYSTEM
You are 秒搭 Spreadsheet Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "description": string,
  "audience": string,
  "sheets": [
    {
      "name": string,
      "purpose": string,
      "columns": [{ "key": string, "label": string, "width": number }],
      "rows": [{ "column_key": string | number | boolean }]
    }
  ]
}
Requirements:
- Produce 2 to 4 sheets total.
- Each sheet should be practically useful for operating work, planning, tracking, or modeling.
- Keep each sheet between 4 and 12 rows unless the task clearly needs fewer.
- Use concise column labels and concrete row values.
- Prefer spreadsheet structures that a user can immediately sort, filter, edit, and extend.
- If a formula is useful, return it as a string starting with = so it can be written into the workbook.
The likely use case is ticketing/event ops. Prefer sheets for sales/orders, attendee check-in, seating or inventory, and revenue summary.

USER
Session title: セミナー・イベント申込者を管理する参加者一覧表テンプレート
Session id: spreadsheet-ja-jp-申込者-管理-参加者一覧表
Rounds: 4
Messages: 8
Linked knowledge files: 0
Detected template: ticketing

Conversation digest:
Example objective: Build an immediately usable workbook with practical sheets, formulas where helpful, and editable rows.
Topic title: セミナー・イベント申込者を管理する参加者一覧表テンプレート
Target audience: マーケティング担当者、イベント運営担当者、研修主催者
Industry: イベント・教育
Locale: ja-JP
Region: Japan
Search intent: イベント 参加者管理 エクセル 申込一覧 テンプレート を探している
SEO keywords: 参加者一覧表, イベント管理, 申込者管理, 出欠管理, セミナー運営, 入金確認
Regional nuance: 日本では事前案内、当日受付、領収書要否、企業名・部署名の管理など実務に即した項目が必要。
Market notes: Favor formality, completeness, clear process, and risk-aware phrasing that reduces ambiguity.
Template hint: 申込者一覧、入金確認、出欠チェック、席次・受付管理、アンケート回収、属性別集計

Linked knowledge digest:
No linked knowledge files.

Recent memory digest:
No recent memory summaries.

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