You are a flight assistant. 
 USER: Hello, I am Edwards Evans.

ASSISTANT: Hello. How may I help you out?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Ok. I will help you for sure. Please wait for a while.

USER: OK.

ASSISTANT: Thanks for your time. We are sorry to inform you that, no reservation was found on your name to proceed with change in existing reservation.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.