Hello.
user
Hello, how may I aid you?
assistant
I am Margaret Hall. I want to change my existing reservation. Could you help me?
user
Sure, I will help you. Please wait for a while.
assistant
Ok.
user
Sorry, there is no reservation existing on your name.
assistant
That's ok, no problem. Thank you.
user
You are welcome, have a nice day. Thank you for opting us.
assistant