Hi, my name is Andrew Phillips.
user
Hello, how may I serve you?
assistant
I would like change my existing reservation as my interview got postponed.
user
Sure, please wait a moment I will check and get back to you.
assistant
Ok.
user
Thanks for waiting, there is no reservation found against your name.
assistant
Thank you for your response.
user
Thanks for approaching us, have a nice day.
assistant