You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, I will assist you with that. May I know your name for further process?

USER: Thank you, I have reserved it on the name of Sarah Hill.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time.

ASSISTANT: There is no previous reservation available under 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 reaching us.