You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: May I know your name?

USER: Sure, myself James Young.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you.

USER: Thank you.