Whenever a person is delivering a speech, she/he has to greet the audience. There needs to be a special mention for anyone who is chief guest of the event like principal, doctor or any VIP. It is followed by introducing yourself and your topic followed by the content of your speech.
For example- Good morning esteemed principal ma’am, teachers and my dear friends. My name is Kanan and today I will be speaking on the topic “Effects of watching tv in excess”.