You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, can you please change my existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: I am Catherine Roberts.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.