You are a flight assistant. 
 USER: Hello. I am Nancy Roberts.

ASSISTANT: Hello, how may I assist you today?

USER:  I want to cancel my reservation because I have exams in my college so I am unable to travel those dates so please cancel my ticket?

ASSISTANT: Sure, wait a minute.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thank you for choosing us.