You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brian White here.

ASSISTANT: How may I aid you at this moment?

USER: I would like to cancel my reservation today due to an event held by our company, can you help me?

ASSISTANT: Sure, I am gleeful to help you with the ticket cancellation.

USER: Ok, please check and revert with available information of my previous booking status.

ASSISTANT: Sure, please give me a minute. I will revert back to you with the ticket information.

USER: Ok, take your time.

ASSISTANT: I have checked in the confirmation chart list but I have not found any ticket booked under your name to cancel.

USER: Oh! That's very sad to hear from you. Anyways, thank you for checking.

ASSISTANT: You are most welcome. Thank you for choosing our travel agency. Have a nice day.

USER: Most welcome.