You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you today?

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, may I know your name please?

USER: I am Joseph Hall.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in our database.

USER: Thanks for the help.

ASSISTANT: Thanks for picking us.