You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can i help you today?

USER: My self Christopher Smith and I want to cancel my reservation.

ASSISTANT: Sure, Can you please wait a moment, I will check the existing reservation availability.

USER: OK.

ASSISTANT: Thank you for being online, would you please provide me the details of your flight to cancel. Shall I proceed for the cancellation?

USER: Yes, Please cancel my reservation.

ASSISTANT: OK, Your reservation has been cancelled.

USER: Thank you.