You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I aid you today?

USER: Due to an emergency, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure. May I know your name for proceeding further?

USER: Christopher Martinez here.

ASSISTANT: Thanks for providing your name. There is no reservation found on your name.

USER: No issue, Thanks for the help.

ASSISTANT: Thank you for reaching us.