You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Gary Adams here. My seminar was postponed so I just want to cancel my recent reservation.

ASSISTANT: Sure, I can help you with that. Please allow me a moment.

USER: Ok.

ASSISTANT: Gary, I have successfully cancelled your reservation.

USER: Ok, thanks for your services.

ASSISTANT: You are welcome. Thank you for contacting us.