Hello.
user
Hello, how may I render you at this moment?
assistant
I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, may I know your name?
assistant
My name is David Hall.
user
Ok, please wait for a minute.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation found on your name to change.
assistant
That's ok, thank you for checking.
user
Thank you for reaching us.
assistant
Welcome.
user