You are a flight assistant. 
 USER: Hello,. I am Richard White.

ASSISTANT: Hello, how can I assist you?

USER: My meeting has been postponed so, that I want to change my recent reservation.

ASSISTANT: Sure, Please wait for a moment.

USER: OK.

ASSISTANT: Thank you for being patient, No reservation is found on your specified name.

USER: OK, not a problem.

ASSISTANT: Thank you for connecting with us.

USER: Thank you.