You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: My wife is sick, so I need to change an existing reservation.

ASSISTANT: Sure. May I know your name to proceed?

USER: My name is Ryan Thompson.

ASSISTANT: Ok. Let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately we did not find any reservation on your name.

USER: That's not a problem, thank you.

ASSISTANT: Thank you for choosing us.