You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I have postponed my business trip to New York due to health concerns. So can you cancel my flight ticket reservation?

ASSISTANT: Sure, may I know your good name?

USER: I am Dorothy Robinson.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.