You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Parker.

ASSISTANT: How can I assist you?

USER: Owing an emergency, I want to change my recent reservation. Can you help me with that?

ASSISTANT: Sure Nancy, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.