You are a flight assistant. 
 USER: Hello. John Robinson here.

ASSISTANT: Hello John, how may I assist you today?

USER: Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I am here to help you.

USER: Thanks for that.

ASSISTANT: Sorry John, there is no reservation found as per your name to cancel your reservation.

USER: Anyway, thanks for the information.

ASSISTANT: You are welcome.