You are a flight assistant. 
 USER: Hi. James Carter here.

ASSISTANT: Hello, how can I assist you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Ok.

ASSISTANT: Could I have your name please?

USER: I am James Carter.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: Not a problem. Thank you.

ASSISTANT: You are welcome, have a great day.