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