You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: May I know your good name?

USER: I am Steven Garcia.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Thanks.

ASSISTANT: Thank you for availing us.