You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your assistance?

USER: As my appointment to consult a  doctor was cancelled, can you please help me in changing my earlier reservation?

ASSISTANT: Sure, please give me a minute I will revert you with current status. May I know your good name?

USER: My name is Brandon Lee.

ASSISTANT: Thank you for providing your name, unfortunately there is no reservation found with your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you, have a nice day.