谁知道英语演讲的开场白和谢幕词怎么讲啊？

开场白:Hello,good afternoon,everybody.Nice to meet you all here.Now let me introduce myself.My name is###.I'm from *** School.I'm honored to give a speech here.Today,I'm going to talk about XXX(your topic)

谢幕词：That's all.Thanks for listening.