You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you now?

USER: My seminar was postponed at Dallas & Fort Worth, so I want to change my existing reservation.

ASSISTANT: Ok, may I know your good name please?

USER: Sure, I am James Williams.

ASSISTANT: Thanks for providing your name.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, thank you for your information.

ASSISTANT: Thanks for connecting with us. Wish you a great day.