You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Myself Elizabeth Martinez. I am planning to visit Dallas, will you help me in booking the flight ticket from ATL to DFW?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Sept 06 and Sep 08.

ASSISTANT: Do you need any specifications?

USER: I need a flight with single connection which return in evening time.

ASSISTANT: Can I know your preferences?

USER: I dont't have any preferences.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.