phone

I have to make a phone call.

call

extension

Please dial extension 123. (formal)

What's the phone number?

Hello, this is Philipp Neumann.

Could I please speak to Mrs. Steller?

Mrs. Steller is not here.

answering machine

mailbox

Please leave a message. (formal)

Mrs. Steller will call you back. (formal)

Goodbye!