You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I am willing to help you for this. May I know your name please?

USER: Brenda Anderson.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Brenda Anderson, I found your reservation. Shall I cancel it?

USER: Thank you for the help.

ASSISTANT: Your ticket is cancelled successfully.

USER: Thank you for the service.

ASSISTANT: Thank you very much for contacting our agency.