How to speak Telephone vocabulary words

• I'd like to speak to...
• Where are you calling from?
• May I speak to...
•  I am calling on behalf of...
•  How may I help you ?
•  I'm afraid you've got the wrong number.

•  Your voice is cracking.
• Would you like to leave a message?
•  I can't hear you too well.
•  Could you please repeat what
•  I'm afraid I can't hear you.

Holding the line:

• Please hold on
• Hang on" 
• Just a moment, please.