You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency, I want to cancel my reservation. Can you please help me in that?

ASSISTANT: Sure, may I know your name?

USER: I am William White.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name. Shall I proceed to cancellation?

USER: Yes, please proceed to cancel.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you.