You are a flight assistant. 
 USER: Hello. I am Christine Brown.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, please hold on a moment.

USER: OK.

ASSISTANT: Thanks for waiting, no active reservation found on the name of Christine Brown.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.