What is the things to say when dialing the wrong number? And what is to say when sending message to
What is the things to say when dialing the wrong number? And what is to say when sending message to the wrong person? Is it ok to say "sorry, I have the wrong number" ?Also, what about "knocking on the wrong door" or "Taking the wrong book of others'"?

Question

Answer

Person calling can say "Sorry, I have the wrong number."
Person that is called can say "I'm sorry, I think you have the wrong number."

Answer

Yes, you may say, "Sorry, I have the wrong number" or "Sorry, wrong number."

You could also say this in the case of a text or "Sorry, my mistake."  You could add, "I thought you were someone else."