Conference trip report template?

Does anyone have a good trip report template? For example, when one team member is attending a conference and you want him/her to summarize the highlights of the conference for the rest of the team upon returning.

I realize that this may be as simple as having the person record a sentence or two for their top 5-10 key takeaways or learnings per day and then distribute that; I'm just curious if anyone has a formula or template that's proven effective for this kind of situation.

Thanks!