You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help are you looking from our service?

USER: Actually, I reserved my flight ticket before one month back to travel to New York, but unfortunately my plan has been postponed. Can you help me to cancel this reservation?

ASSISTANT: Sure, I will help you with that. Please let me know on which name is the ticket booked with?

USER: I am Mark Lewis.

ASSISTANT: Sorry, there is no ticket booked on your name to cancel.

USER: It's not a problem. Thanks for checking.

ASSISTANT: You are welcome. Have a great day.