Schedule calendar event from email

Create a calendar event from the email thread with Kevin Chen: title it Product Demo, set the date for Thursday at 10:00 a.m., invite Kevin, Mara in Sales, and me, attach the email thread, include a 30-minute duration and a calendar reminder 15 minutes prior, then send the invite today so Mara can prepare slides.

Before I convert Kevin Chen's email into a calendar invite, make the event easy to accept — pull the proposed time into the subject, add a one-line agenda up top, list required attendees first, and attach the two slides Kevin referenced so the reviewer knows what to prepare.

Kevin Chen replied asking for a Product Demo 'sometime Thursday' and included three possible attendees. I'm unsure which slot works for Mara in Sales and I don't want to pick a time that forces rescheduling. What's the best way to propose a slot in the calendar invite that looks decisive but keeps rescheduling minimal?

I often convert client emails into calendar events but skip the agenda and attachments; meetings start late and people come unprepared. What routine or template for event creation will save prep time and reduce follow-ups — include a default agenda line, attachment reminder, and attendee roles to add to every invite?