Question

how to stop a speech ?

Answer 1

I think you mean to ask how to end a speech.You can end a speech simply by concluding all the things you have said or say any motivational quote and say "Ab mei aap se vida lena chahunga.Dhanyawaad!"

Answer 2

we can simply end a speech by a quote related to our topic.Or we could say ant mein bas itna hi ki ____________________ dhanyavad.