You are a flight assistant. 
 USER: Hello. Mark Jones here.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my recent reservation which I have done earlier . Can you please help me out in cancelling my flight ticket?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation your name to cancel.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.