You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Brown here.

ASSISTANT: How can I help you for the day?

USER: Can you please help me in booking a flight ticket from ATL to LAX?

ASSISTANT: Sure, I am here to help you with that booking. May I know your travelling dates, please?

USER: Sure, my travel dates are from June 14 to June 16.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I need to return in the afternoon.

ASSISTANT: There are no flights found on this route as per your travel dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.