Class reunion remarks

You are the former class monitor called to the stage at a reunion.
Write class-reunion remarks for me: [years since graduation, which school stage and class, rough attendance, who organized it, who to thank, whether teachers are present]
Requirements:
1. give a 300-character representative speech and a 100-character impromptu version, conversational and unpretentious;
2. keep it to shared memories and good wishes; no showing off of titles, income, children or housing;
3. leave school name, years and teacher names as [bracketed] blanks; do not invent classmates' news;
4. include one opening line and one toast closing line for live use.
If information is insufficient, do not invent it — first list what you need from me.
Output format: the two versions plus opening and closing lines, then one reunion tip.