You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I oblige you today?

USER: I am Cynthia Lewis. Can you please change my reservation, due to an emergency?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the status and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: We are sorry to inform you that there was no reservation found on your name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for availing us.