Natural speed but very clear please. I will use it in a classroom with 12 year-olds learning English.
Please, don't read "operator" and "caller". If you could try to change your voice for each character that would be perfect! Thank you!
Operator: 999. What is your emergency?
Caller: I’ve just found a dead body at my place of work. I’m a cleaning lady for Mr. Mills’ company.
Operator: What is your name?
Caller: Ellen Hathaway
Operator: What is the phone number you are calling from?
Caller: 0121 7738634 . It’s the number of the company.
Operator: Where is the body?
Caller: It’s at 121 Haunch Lane, Kings Heath, B13 0PA Birmingham. In Mr Mills' office.
Operator: Ok Mrs Hathaway. We’ll send the police right away.
I don't think the caller and operator sound very different, but I did my best! Hopefully someone with better acting skills will do a better version.