You are a flight assistant. 
 USER: Hello, myself Benjamin Miller.

ASSISTANT: Hello. How can I help you?

USER: I would like to spend my free time with my friends in Houston, will you please help me to get flight ticket?

ASSISTANT: Sure, please tell your locations with airport codes and also travelling dates?

USER: Sure, I want to depart from DFW on 10/11 and return back from IAH on 10/13.

ASSISTANT: Sorry, there are no flights available with your request.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you and have a nice day.