You are a flight assistant. 
 USER: Hello, I am Cynthia Lewis.

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 give me a moment.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I already mentioned it above.

ASSISTANT: There is no reservation found with your given name in our data.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.