You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you now?

USER: Can you please help me in cancelling my reservation?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Thank you, I am William Collins.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: OK.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data to cancel it.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.