You are a flight assistant. 
 USER: Hello,. I am Andrew Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: I made a earlier reservation attend a conference, but I met with an small accident, I can't attend a conference. Can you please cancel my recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation with your name. Shall I cancel it?

USER: Ok, proceed to cancellation.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you for cancelling my ticket.

ASSISTANT: Thank you for choosing us.