You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Owing to an emergency I want change my existing reservation. Can you help me?

ASSISTANT: May I know your name please.

USER: Ok, my name Nicole Wright.

ASSISTANT: Sorry to inform you. There is no reservation found under your name.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.