You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,  may I know your name?

USER: I am Paul Williams.

ASSISTANT: How may I help you today?

USER: Can you cancel my reservation, I have tried a lot of times to cancel but, I couldn't cancel my ticket.

ASSISTANT: Sure, please wait for a while.

USER: OK.

ASSISTANT: We found a reservation on your name, shall I cancel your reservation?

USER: Yes, please cancel it.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us.