You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you now?

USER: Can you make a flight reservation from NC - CLT to TX - AUS?

ASSISTANT: Sure, on which dates you want me to make a reservation?

USER: My planned dates are from 11/17 to 11/19.

ASSISTANT: May I know your name?

USER: I am Nancy Perez.

ASSISTANT: Thank you but, no flights are available on that dates. Thanks for reaching us, have a good day.