You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Jones.

ASSISTANT: How may I help you now?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: I am here to help you, please allow me to check with your previous booking for a moment.

USER: Sure.

ASSISTANT: I found a reservation by your name, can I proceed with cancelling it?

USER: Please cancel it.

ASSISTANT: Your ticket is successfully cancelled, you will receive your refund within a week.

USER: Thank you for understanding and cancelling my reservation.

ASSISTANT: Thank you for choosing us.