You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Hill.

ASSISTANT: How may I help you?

USER: I want to cancel my reservation due to sudden postpone of my trip dates.

ASSISTANT: Ok. I will check the reservation list and let you know. Please wait.

USER: Okay.

ASSISTANT: Thanks for your patience, we found a reservation on your name. Shall I proceed to cancel?

USER: Please cancel it.

ASSISTANT: Your reservation is cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, Have a nice day.