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, may I know your name?

USER: Thank you for accepting my request, I have reserved it on the name of Donna King.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say, no reservation found with your name.

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

ASSISTANT: Thanks for reaching us.

USER: Anyway, thank you for checking.