You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my reservation due to sudden health issue, can you please help me out with that?

ASSISTANT: Sure, can I have your name please?

USER: Thank you for accepting my request. I have reserved it on the name of Richard Green.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for opting us.