You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my recent reservation owing to an emergency.

ASSISTANT: May I know your name?

USER: I am Gregory Jackson.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.