You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend a Seminar in Atlanta. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you. Can I have your airport codes please?

USER: My airport codes are DFW and ATL.

ASSISTANT: May I know your planned travel dates please?

USER: My travelling dates are Apr 02 and Apr 04.

ASSISTANT: May I know your name please?

USER: My name is Ruth Green.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I prefer single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to return on evening.

ASSISTANT: Ruth Green, no flights has been found on your specifications.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for approaching us.