You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do to make your experience better with us?

USER: As I need to continue my investigation, I have planned to travel New York. But, due to some issues my trip was delayed. So, Can you help me cancel my reservation?

ASSISTANT: Sure, I'll help try to help you in cancelling your ticket.

USER: Thank you.

ASSISTANT: Could you please help me by providing your name to check the reservation status?

USER: Sure, Melissa Nelson is my name.

ASSISTANT: Ok, please wait a while.

USER: Ok.

ASSISTANT: Thank you for being patient. I have checked in reservation list to cancel your ticket, but could not find any reservation active in our database matching with your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for remaining so positive. We hope to serve you again.