1. Hi, this is Jane. 2. (formal) May I speak with John Smith? 3. (informal) Is John there? 4. I'm calling about... 5. I'm returning your call. 6. (formal) One moment, please. 7. (informal) Hang on a sec. 8. He's not here. Would you like to leave a message? 9. Could you ask him to call me back? 10. Thanks for calling.