You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you aid me to book a flight ticket from ORD to ATL?

ASSISTANT: Sure, could you please ensure your preferable dates?

USER: My planned trip dates are Aug 8 and Aug 10 respectively.

ASSISTANT: For booking purpose I required your name, can I know your name?

USER: David Hall here.

ASSISTANT: Is there a connection you prefer in between your journey?

USER: I prefer for a lay by in between my journey.

ASSISTANT: Do you have any other restrictions to be met?

USER: No other requirements for me to met, you can proceed for booking.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.