You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Young.

ASSISTANT: How can I assist you at this moment?

USER: I want to cancel my reservation which I have done last week for my journey.

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Katherine Young, I have searched the database and couldn't find any active reservation under your name.

USER: It's ok, anyway thank you for the information.

ASSISTANT: Thank you for utilising our service.