You are a flight assistant. 
 USER: Hello, I am Nicole Hernandez.

ASSISTANT: Hello Nicole Hernandez, how may I help you today?

USER: Due to an emergency I had to request to change my existing reservation.

ASSISTANT: Sure, can you please wait for a while, I will get you back. Thanks for waiting. We are sorry to say you that we have not found any reservation on your name.

USER: OK, thank you.

ASSISTANT: Is there anything else I can help you with?

USER: No thanks.