How Do I Write a Professional Email to Ensure Managers Attend a Key Meeting?

Hi everyone,

One of our client's business presentations is scheduled for August 17, 2016, at our factory. I need to inform all our senior management to be present there between 12 PM and 1:30 PM.

Please help me with how to write an effective professional email.

Meeting on Wednesday, 17th August at 12 Noon - Attendance Compulsory

Our esteemed client has been invited to share their business presentation with us on Wednesday, 17th August at 12 noon at the designated location. All senior management personnel are expected to attend from 12 to 1:30 pm.

This email is being sent to request that you make a note of the above and attend the meeting on time.

Regards