You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you at this moment?

USER: I am Jessica Parker. Owing to an emergency, I want to change an existing reservation.

ASSISTANT: Sure, I will help you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, we are sorry to say that no reservation was found on your name in our database.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.