You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Robert Wilson. I have cancelled my trip in this month, could you help me with that?

ASSISTANT: Sure, give me a moment.Let me check your details.

USER: Sure.

ASSISTANT: I am sorry Robert, I did not find any reservation with your details.

USER: Oh! that's is fine. Anyway, that you for your support. Thank you.

ASSISTANT: You are welcome.