You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to ABC flight booking agency. How can I be a help for you?

USER: Actually, I want to cancel my recently done reservation due to some problems I want to cancel my trip. Can you please help me in this?

ASSISTANT: Sure, on which name is the ticket booked?

USER: Sure, myself Nancy Jones here.

ASSISTANT: Sorry, there is no previous reservation found on your name to cancel.

USER: Ok, fine. Thank you for your service.

ASSISTANT: You are welcome. Have a great day.