Is Peter there? (informal)
Can you put Peter on, please?
Could you put me on Peter, please?
Could you connect me with Peter, please?
I am trying to get hold of Peter?
Hold the line, please.
Hang on. (Informal)
Who shall I say is calling?
Could you repeat your name, please?
Would you mind repeating me your name?
Could you spell your name, please?
The line in busy.
Could you ask Peter to call me back?
Can you have Peter call me?
I'll get Peter to give you a call.
Excuse me, I thought I dialed the right number.
I dial a wrong number.
I'm sorry to have bothered you.
Please accept my apologies.
Peter is not available at the moment.
May I take your name and number?
Can you pass on a message, please?
Could you put me through someone in charge?