You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you with that. May I know your name please?

USER: David Gonzalez.

ASSISTANT: Please wait for a while, let me check your previous reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to cancel.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.