You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I aid you today?

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

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please send me your name.

USER: I am Brenda White.

ASSISTANT: Thanks for providing your name. But no reservation is found in search.

USER: No problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.