You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for a flight from LAS to MCO, can you help me in booking?

ASSISTANT: Sure, can you please let me know your trip dates?

USER: Sure, my planned travel dates are Sept 13 and Sept 15.

ASSISTANT: Do you have any specifications?

USER: I would like to return my journey for the afternoon flight.

ASSISTANT: May I know your name please?

USER: Myself Justin Hall.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.