You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you for the day?

USER: Owing to an emergency, I want to change my existing reservation, can you help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, Jeffrey Parker here.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.

ASSISTANT: Have a nice day.