本周星期天学校有一次讲座(lecture)请你拟一个通知内容包含一下要点英语作文

采用Ladies and gentlmen,may I have your attention please?
We are going to hold a lecture reported by a famous doctor from American In the school auditorium around 3:00pm on saturday this week,which is about the difference between American English &British English as well as how to learn it well.
All students must be present,and there will be a discussion in class after the meeting
That's all