You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Actually, I want to change my reservation because my trip got postponed. Can you help to cancel my flight ticket?

ASSISTANT: Sure, I can help you with it. Before proceeding, may I know your name please?

USER: Myself Raymond Allen.

ASSISTANT: Raymond, there is no reservation on your details.

USER: Oh! ok, thank you for the information.

ASSISTANT: Welcome.