You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Rachel Williams want to cancel my reservation due to prepone of my exams. Can you please help me in cancelling?

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check with the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name to cancel it.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.