You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Karen Young here.

ASSISTANT: Young, how can I aid you today?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check in our records.

USER: Sure.

ASSISTANT: Sorry Young, there are no flights has been reserved on your name formerly.

USER: Ok, not a problem. Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.