You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to heavy snowfall in Dallas football has been cancelled, so I would like to cancel my recent reservation to Dallas.

ASSISTANT: Please share, on whose name did you reserved the ticket?

USER: Previously, I have done my reservation with the name of Helen Taylor.

ASSISTANT: Please wait a while.

USER: Sure, take your own time.

ASSISTANT: Helen Taylor, there is no reservation found in our database on your name.

USER: Ok, no issues. May be my brother has cancelled my reservation on behalf of me.

ASSISTANT: Thanks for you reaching us.

USER: Thank you for checking.