Hello.
user
Hello, how can I help you today?
assistant
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
user
Sure, May I know your name?
assistant
I am Emily Allen.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
That's ok, thank you for checking.
user
Thank you for choosing us.
assistant