You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Harris here.

ASSISTANT: How can I aid you at this moment?

USER: I need to cancel my recent reservation because my trip dates are postponed.

ASSISTANT: Sure, I will help you in cancelling your reservation.

USER: Thank you.

ASSISTANT: Please allow me a moment to check for the previous reservation status on your name.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to cancel it. Thank you for opting us.

USER: It's ok, not an issue.

ASSISTANT: Thank you.