Hello, it's ... Go ahead.
Can I talk to ...?
Is it ... at/there/at home?
When you answer the phone to introduce yourself, you can say:
This is ... Go ahead.
This is ... Go ahead/here.
... is talking.
If the person you are looking for is not here, you can say:
Sorry, he/she is not in/here/at home.
He/she is out now.
If the lines are not good, you can say:
Sorry, I can't hear you clearly.
Please say it again. The line is not good
If you want to send a message or leave a message, you can say:
Can I leave a message for him/her?
Could you take a message for me?
Could you tell him/her to call me back when he/she comes back?
Ask him/her to call me back.
6. Say goodbye:
See you later.
Goodbye and good night.
See you tomorrow.