Hello.
user
Hello, how can I aid you?
assistant
I want to change my existing reservation, which is done recently. Can you please help me out?
user
Sure, may I know your name?
assistant
Thank you for considering my request. Myself Raymond  Davis.
user
Give me a minute.
assistant
Sure, I will wait.
user
Sorry, there is no reservation found under your name.
assistant
Not an issue, anyway thank you for the information.
user
Thank you for reaching us.
assistant