You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. By what way can I serve you now?

USER: Due to some emergency I need to cancel my recent reservation can you help me cancelling my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name to cancel your ticket?

USER: I am George Brown.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation on your name to cancel it.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us.