You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation due to some issue. Could you do this for me?

ASSISTANT: Can I know your name for checking the details?

USER: I am Nicholas Davis.

ASSISTANT: Give me a minute Davis. Sorry, there is no reservation found on your name.

USER: Ok, thanks for your information.

ASSISTANT: Welcome.