You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Due to sudden health issue, I want to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, can I know your name please?

USER: Thank you, I have reserved it on the name of Ruth Turner.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for approaching us.