Choose suitable words for the telephone dialogue

Telephone Revision
Choose suitable words for the telephone dialogue below:
sure message hold afraid this help repeat through call

• 
  Operator: Hello, Frank and Brothers, How can I help you?
  
• 
  Peter: This is Peter Jackson. Can I have extension 3421?
  
• 
  Operator: Certainly, please hold and I'll put you through
  
• 
  Frank: Bob Peterson's office, Frank speaking.
  
• 
  Peter: this is Peter Jackson calling, is Bob in?
  
• 
  Frank: I'm afraid he's out at the moment. Can I take a message?
  
• 
  Peter: Yes, Could you ask him to call me at 9147 6320. It’s urgent.
  
• 
  Frank: Could you repeat the number please?
  
• 
  Peter: Yes, that's 9147 6320, and this is Peter Jackson.
  
• 
  Frank: Thank you Mr Jackson, I'll make sure Bob gets your message.
  
• 
  Peter: Thanks, bye.
  
• 
  Frank: Good bye.
  

Circle the appropriate preposition for the sentences/questions below:

1. 
   I can’t hear you I’m sorry, you are breaking in/up. May I hang in/up and call you straight back?
   
2. 
   Would it be okay if I called you back in/at 15 minutes?
   
3. 
   Thank you. I really am very grateful to/at you for/at all your help.
   
4. 
   I’m calling on/about the low interest rate loans.
   
5. 
   I’ll send you a confirmation on/in writing. You should receive it by/within Friday.
   
6. 
   I’m sorry, I’ve been on/in the phone for the last hour.
   
7. 
   Could I speak at/with Mr Brown please?
   
8. 
   William, there was a call to/for you when you were at lunch.
   
9. 
   I’m afraid that Christine is not in/at her office right now.
   
10. 
    I can take your details over/in the phone now if you have time.
    

What would you say to someone on the phone if…

1. 
   you couldn’t understand their name?
   

Could you repeat your name, please?

2. 
   you answered your colleague’s phone and he/she was out at lunch at that moment?
   

I'm afraid s/he's out at the moment. Can I take a message?

3. 
   you had called him/her and the line was very bad (i.e. it was very noisy and you couldn’t hear them well)?
   

I can’t hear you I’m sorry, you are breaking up. May I hang up and call you straight back?