You are a flight assistant. 
 USER: Hello, I am Steven Lee.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me out in cancel my recent reservation?

ASSISTANT: Sure, please wait for a while, I will check and revert you.

USER: OK.

ASSISTANT: We are sorry to inform you that, there is no reservation found against your name.

USER: Thanks for the information.

ASSISTANT: Thank you for choosing us. Have a nice day.