Помогите составить диалог между двумя друзьями на тему "On the telephone"

Good morning. Robert Smith speaking.  Good morning. This is Artyom Mironov. I would like to speak to Mr. Brown.  Oh, sorry. Mr. Brown is not here, yet.  Can you tell me when he will be in?  Probably around 4 pm. Alright, I will call again later then. Thank you.  You’re welcome.  Bye.  Bye.