You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How  can I assist you at this moment?

USER: I booked a flight ticket in your agency for my holiday trip to New York but now I want to get it cancelled. So can you go ahead and cancel my flight ticket?

ASSISTANT: Sure, I am happy to help you with that.

USER: Ok.

ASSISTANT: Can I have your good name please to check your reservation status?

USER: I am Helen Thomas.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Helen Thomas, no reservation has found under your name to cancel.

USER: Not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us, have a good day.