You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your good name?

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

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found 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 choosing us.