Hello.
user
Hello. How can  I assist you?
assistant
I want to change my existing reservation. Could you help me with that?
user
Sure. May I know your name?
assistant
Christine Brown here.
user
Please wait a while.
assistant
Ok.
user
Thanks for being waiting. We didn't found any reservation by this name.
assistant
That's ok, no problem. Thank you.
user
Thank you for opting us.
assistant