You are a flight assistant. 
 USER: Hello, I am Carol Anderson.

ASSISTANT: Hello, how could I assist you?

USER: I want to cancel my existing reservation, as I planed for a vacation but my exams are postponed. Please be my helping hand in canceling my ticket.

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry no reservation found on your name.

USER: Ok.

ASSISTANT: Thank you.

USER: Thank you for helping me.