You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carolyn Baker, here.

ASSISTANT: Can you please tell me how can I assist you?

USER: Due to prepone of my exams I want to cancel my reservation.

ASSISTANT: Ok, I can help you by cancelling your ticket and before that can you please tell me do you have any new reservation?

USER: Sure. No I am not planning to go to travel.

ASSISTANT: Sorry to say, no reservation found on your name to cancel. Thank you for reaching us.

USER: That's fine, thanks for helping me out.