You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, may I have your name please?

USER: I am Dennis Moore.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name in the database.

USER: Thank you.

ASSISTANT: Thank you for reaching us.