Hello, this is Helen speaking.
Hello, Helen. This is John. How are you?
Fine, thank you. And you?
Fine, thanks. I'll have a party next Sunday at home. I'm calling to ask whether you can come or not.
Oh, how wonderful. I'll be glad to.
Okay, now you are a famous star.
Hum, don't say that. Maybe you can do something useful for me.
What's wrong with you?
I'll tell you at the party.
Okay.