You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER:  I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name to check with existing reservation?

USER: Gary Hill here.

ASSISTANT:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Sure. Thanks for the information.

ASSISTANT: Thank you for opting us.