You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Due to sudden health issues, I would like to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, may I know your name please?

USER: Thank you for accepting my request, I had reserved it on the name of James Lewis.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: Oh! I think the ticket was not booked due to server issue.

ASSISTANT: Thank you for opting us.

USER: Anyway, thank you for the information.