You are a flight assistant. 
 USER: Hello, I am Barbara Baker.

ASSISTANT: Hello. How can I aid you?

USER: Due to emergency health problem I need to cancel my reservation can you please help in cancelling my reservation.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you.