You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please change my reservation due to some sudden changes in my plan?

ASSISTANT: Sure, may I know your good name please?

USER: Nancy Thompson is my name.

ASSISTANT: Thank you Nancy, there is no reservation on your name.

USER: Ok, not a problem. Thanks for your information.

ASSISTANT: Thanks for picking us.