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 issue, can you please help me out with that?

ASSISTANT: Sure, I am happy to help you. May I know your name?

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

ASSISTANT: Thank you. Please wait, let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

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

ASSISTANT: You are welcome and thank you for choosing us.