You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am William Brown, actually I have done booking with your agency to travel Boston for attending an interview on 04/12. But, now I am not willing to attend that interview can you please cancel my reservation which I have done for my interview?

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you for the positive response.

ASSISTANT: Please hold on for a while. I will check the status for a while.

USER: Sure, have your time.

ASSISTANT: I have found your reservation and as per your request you I have cancelled the reservation.

USER: Thank you for cancelling my reservation and for your quick response.

ASSISTANT: Thank you for choosing our services.