Hello.
Hello, how can I help you today?
I want to change my reservation due to some issues, can you help me in doing that?
Sure, I am here to help you with that, can I know your good name to proceed further?
I am Christine Williams.
  I am very sorry to inform you that there is no reservation found under your name in our database.
Ok, no issues. Thank you for the information.
 Thank you for reaching us.