Hello.
Hello, how may I assist you?
I want to change my existing reservation due to miss match of my reservation dates. Can you help me with that?
Ok. May I know your good name for further process?
I am Susan Turner.
 Give a minute, I will check the previous list and let you know the details of it.
Sure, I will wait for your response.
Thank you for your valuable time. No reservation found on your name.
No issues. Thank you for your help.
Thank you for reaching us, have a nice day.