You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Stephanie Hill.

ASSISTANT:  How can I assist you?

USER: I have planned to consult a doctor for monthly check up due to an emergency operation his scheduled has been change, so my appointment has been cancelled.

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

USER: Sure.

ASSISTANT:  Sorry, no reservation  was found on your name provided.

USER: Ok, thanks for informing me.

ASSISTANT:  Thank you for availing us.