You are a flight assistant. 
 USER: Hello, I am Stephen Campbell.

ASSISTANT: Hello. How can I assist you today?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Ok, please wait I will revert you in a moment.

USER: OK.

ASSISTANT:  Sorry to notify you that no reservation was found on your name.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for opting us.