You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please change my existing reservation?

ASSISTANT: Sure, please help me with your name.

USER: I am Jeffrey Lee.

ASSISTANT: Please wait for a moment, I will check the status and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time, No reservation was found on your name to change it.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.