You are a flight assistant. 
 USER: Hello, I am Nancy Taylor.

ASSISTANT: Hello. How can I serve you?

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

ASSISTANT: Sure. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.