You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you expecting from my end?

USER: I want to cancel my recent reservation due to sudden postpone of my trip dates. Can you help me with that?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check whether any active reservation on your name or not.

USER: Thank you. I am Benjamin Lopez.

ASSISTANT: My pleasure. Benjamin Lopez, we have terms and conditions in cancelling the flight. Can you guide me in providing some information.

USER: Sure.

ASSISTANT: Have you booked for refundable flight ticket or not?

USER: Yes.

ASSISTANT: Ok, if I have found any active reservation on your name. If it is cancelled. The money may get refundable but here I don't have any active reservation on your name in our data. I can't help you out.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us. Have a good day.