You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I have booked a ticket earlier but due to some problem at my house, I need to cancel the ticket. Could you please help me with that?

ASSISTANT: Ok, I can help you with that but first can I know your name?

USER: Sure, my name is Paul Collins.

ASSISTANT: Sorry Paul, we did not found your name in our records. May be, some other in your family had cancelled your reservation previously.

USER: May be. Any way, thank you for checking.

ASSISTANT: Thank you for approaching us. It's my pleasure.