Telephoning, Getting ready to call English speakers

We have 10 minutes to prepare. Then we'll start role playing.  

A: Hello, Amarjargal is speaking? Can I speak to Tsengelkhuu, please?  

Ts: Hi, Amarjargal. Tsengelkhuu is speaking. 

Tuvshinbayar and Budtsatsral are working together well.    

Ts: Hello, It is Tsogzolmaa speaking. Can I speak to Badrangua, please?
T: I am afraid she is not in at the moment. Have you tried her mobile?   

S: I'm afraid Davaajargal's line is busy now. Would you like to hold? 

     N: Yes, Please.
                     S: It is ringing for you now
  N: Thank you  

D: Hello, Davaajargal is speaking. 

N: Good morning, Davaajargal. I am calling you to tell...