You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Brain Robinson. I want to cancel my reservation as my plan to meet my brother is cancelled, as my brother is coming to meet me. Can you cancel my reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation with your name.

USER: Ok, please cancel it.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you for opting us.