You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I need your help to cancel my reservation.

ASSISTANT: OK sure , I am here to help you. Please kindly tell me your name.

USER: Yes, myself Gary Thompson.

ASSISTANT: OK. Yes Mr. Gary, I found your reservation. I have cancelled your reservation successfully. Thank you to choose us.

USER: OK, thank you so much.