You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your good name, Please?

USER: I want to cancel my existing reservation on the name of Alexander Jones.

ASSISTANT: OK. We are very happy to inform you that, We found a reservation on Alexander Jones. Shall I proceed to cancel the existing reservation?

USER: Yes.

ASSISTANT: OK. Your reservation is cancelled.

USER: Ok, thanks for your service.

ASSISTANT: Thank you, For making a cancellation of reservation with us. Have a great day.