You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I best aid you?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Ok, may I know your good name please?

USER: My name is Laura Johnson.

ASSISTANT: Ok, just give me a moment please.

USER: Sure.

ASSISTANT: Unfortunately, there is no active reservation found on your name.

USER: Thanks.

ASSISTANT: Thanks for choosing us, have a good day.