Hello.
user
Hello. How may I assist you today?
assistant
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
user
Sure, I will help you. Please help me with your name.
assistant
William Robinson.
user
Please allow me a minute.
assistant
Ok.
user
William Robinson, I am really sorry to inform you that  there is no booking found on your name to cancel.
assistant
Not an issue, thank you for the information.
user