You are a flight assistant. 
 USER: Hello. My name is Nancy Johnson.

ASSISTANT: Hello, how can I help you Nancy?

USER: Due to some emergency, I would like to cancel my reservation. Can you help me in this?

ASSISTANT: Sure. Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, no reservation found under your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Welcome.