You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, wait for some time. May I know your name for process.

USER: I am Joseph Wilson.

ASSISTANT: There was no reservations found on your name. Thanks for choosing us.

USER: Ok, thanks for your assistance.