You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to ABC agency. How may I help you for today?

USER: I need to cancel my reservation, as my friends have already booked my ticket in another flight along with their, I was not aware of this thing, so can you please cancel the ticket for me?

ASSISTANT: Yes, I can help you with that. Please hold on for a moment. May I know your name please?

USER: Ok. My name is Christine Brown.

ASSISTANT: I found an existing reservation with your name.

USER: Ok. Please cancel it.

ASSISTANT: I have cancelled your ticket successfully.

USER: Thank you for your quick service.

ASSISTANT: Than you, have a great day.