You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I amend you today?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Kevin Smith.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Thank you.

ASSISTANT: Thank you for opting us.