You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, I am here to help you. Can I know your name?

USER: Thank you for accepting my request. I have reserved it on the name of Patrick Green.

ASSISTANT: Please wait for a moment to check your details in my records.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, no reservation found on your name in my records.

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.