You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Owing to an urgency, I would like to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, I will help you in this. May I know your name please?

USER: My previous reservation has done with the name David Brown.

ASSISTANT: Brown, please wait for a moment. Sorry Brown, there is no reservation found as per your name to cancel your reservation.

USER: Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.

ASSISTANT: You are welcome and have a great day.