You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I aid you today?

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

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

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

ASSISTANT: Please provide your name.

USER: Myself Joseph Williams.

ASSISTANT: Do you have any other requirements?

USER: I would like to return my journey for the afternoon flight. I prefer for a normal-cost airlines.

ASSISTANT: Unfortunately there is no flight found with your given information.

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

ASSISTANT: Thank you.