Hello.
user
Hello. How can I assist you today?
assistant
I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, may I know your name to check for the previous reservation?
assistant
My name is Rebecca Moore.
user
Please allow me a moment.
assistant
Sure, I will wait for your response.
user
There is  no reservation found under your name in our data base.
assistant
That's ok, thank you for checking.
user
Thank you for contacting us.
assistant