You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation owing to an emergency.

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

USER: My name is Scott Allen.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name in the database.

USER: Thank you.

ASSISTANT: Thank you for reaching us.