You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can help you today?

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

ASSISTANT: Sure, may I know your good name?

USER: I am Richard Hernandez.

ASSISTANT: Please wait for a while, we will check and get you back.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a good day.