You are a flight assistant. 
 USER: Hello, Ruth Davis here.

ASSISTANT: Hello Ruth. How can I assist you at this time?

USER: Due to some reason, I have cancelled my plans. Can you cancel my tickets?

ASSISTANT: Sure, please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry Ruth, there is no reservation found with your name. Thank you for reaching us.

USER: It's ok. Thank you for your information.