You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Jones.

ASSISTANT: How can I assist you?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Ok, sure. Sorry, no reservation found on your name to cancel.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.