请问谁知道英文格式的会议通知的是如何写的?比较正式的.

范例一、主管开会通知
To:All Managers
The next Monthly Management Meeting will be held at 10:00 a.m.on Monday,April 5,in Meeting Room A.
Following is the agenda for the meeting:
1.Purchase of New Office Computers
2.Extension of Summer Holidays
3.Budgetary Control
If there are any other items you would like to be placed on the agenda,let me know by e-mail by the end of this week.
Thank you.
John Doe
范例二、更改会议时间
To:All Managers
The next Monthly Management Meeting,previously scheduled for Monday next week,has been rescheduled for Friday,April 9,same time,same place.
John Doe