You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can i assist you today?

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

ASSISTANT: Sure, we are here to help you to change your reservation. May I know your name?

USER: I am Nicole Jackson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your specified name.

USER: Thanks for the assistance.

ASSISTANT: Thank you for approaching us.