You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Joshua Hill.

ASSISTANT: How may I assist you today?

USER: Due to the inconvenience of dates I want to cancel my reservation, which is done recently. Can you help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Ok, please wait for a while, let me check your reservation status.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry to say you that, there is no flight available under your name in our records.

USER: Ok, I might be canceled by my brother, but he didn't inform me.

ASSISTANT: Welcome and thank you for choosing our agency.

USER: Anyway, thank you for searching.