Привет! Давай разберемся с заполнением диалогов.
1.
— Hello?
— It's Jack here. May I speak to Anna?
— Oh, hi, it's me. Go ahead.
2.
— Hello?
— I'm afraid Mary isn't in at the moment. Can I take a message?
— Can you ask her to call me back later?
3.
— Hello?
— Hi, this is Peter. Can I speak to Sarah, please?
— I'm sorry, but can't answer right now. Can she call you back?
Если что-то не так, дай знать, я помогу разобраться!