You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I aid you for today?

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

ASSISTANT: Yes, I am here to help you about that. Can you please provide your name to check the active reservations under your name?

USER: I am Patrick Wilson.

ASSISTANT: Hold on for some time to check the reservation status.

USER: Sure.

ASSISTANT: Sorry Wilson, I have not found any active reservations under your name to change.

USER: Thank you.

ASSISTANT: Most welcome, thank you for choosing our service.