You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Gonzalez.

ASSISTANT: How can I aid you?

USER: I would like to cancel my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Sure, I am perky to help you. Please wait for a while.

USER: Ok, take your own time.

ASSISTANT: Thanks for waiting, we found a reservation on your name and it has been cancelled successfully.

USER: Thank you for cancelling my reservation.

ASSISTANT: Thank you for choosing us.