You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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. May I know your name please?

USER: I am Ashley Davis.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Ashley Davis, no reservation has been found on your name in our records.

USER: That's ok, thank you for giving information.

ASSISTANT: Thank you for choosing us.