You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, can I know your name please?

USER: My name is Justin Lee.

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

USER: Ok, not an issue. May be something went wrong while booking the ticket.

ASSISTANT: Thank you for approaching us.

USER: Thank you for providing information.