You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know your name?

USER: Benjamin Robinson is my name.

ASSISTANT: How can I assist you ?

USER: Due to terrorist attack at my home town. I need to cancel my recent reservation.

ASSISTANT: Ok, please wait a minute, I will check and tell you about cancellation.

USER: Sure.

ASSISTANT: As I checked with stored data, no reservation occupied on your name, to cancel a ticket.

USER: Ok, thanks for your information.

ASSISTANT: Thank you.