You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation due to postpone of my exams. Can you please help me in that?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Myself Susan Perez.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for opting us.