You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is John Roberts.

ASSISTANT: John, how can I aid you today?

USER: I would like to cancel my reservation, could you help me out?

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

USER: Sure, take your time.

ASSISTANT: Sorry John, there are no flights reserved on your given name formerly.

USER: That's ok. Thank you for your help.

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