You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can serve you today?

USER: I just need your help in cancelling my recent reservation.

ASSISTANT: Sure, I will help you with that. Can I have your good name please?

USER: My name is Benjamin Robinson.

ASSISTANT: Ok, please wait a moment and I will check whether the reservation has existing or not.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry Robinson, there is no reservation found under your name to cancel.

USER: No problem. Thank you.

ASSISTANT: Thank you for choosing us.