You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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 have reserved it on the name of Nicholas Collins.

ASSISTANT: Wait a while, kindly.

USER: Sure, take your time.

ASSISTANT:  Sorry, there is no reservation found for the user name in our back end to cancel it.

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

ASSISTANT: Thank you for reaching us.