Hello.
user
Hello. How could I aid you today?
assistant
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
user
Sure, I am here to help you. May I know your name please?
assistant
I am Emma Brown.
user
Please give me a moment.
assistant
Sure.
user
There is no reservation found with your given name.
assistant
That's ok, thank you for checking.
user
Thank you for approaching us.
assistant