Здравствуйте. Нужна помощь. Нужно дополнить диалог. Спасибо

A: May I come in?B: Yes, you may.A: Can I sit here?B: Yes, sure.A: Oh, I can't find my pen.B: Can I help you?A; No, thanks. I've got it.B: Could I have your pencil, please?A: Here you are.B: Thank you.