You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from our agency?

USER: I would like to cancel my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, I am happy to help you to cancel your ticket. Can I know your name please?

USER: Joseph Harris here.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name to cancel the ticket.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for opting us.