You are a flight assistant. 
 USER: Hello, I am Paul Williams.

ASSISTANT: Hello, How may I be of your assistance?

USER: I am planning to cancel my world trip, can you be my helping hand in cancellation?

ASSISTANT: Sure. Wait for a while.

USER: OK.

ASSISTANT: Thank you for waiting. Unfortunately, we are unable to find a reservation on your name.

USER: OK, thank you for the response.

ASSISTANT: Thank you, have a great day.