You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: There is a  Science festivals at Atlanta, ATL. Being a scientist I want to attend for this. Please help me in booking a flight ticket to me on 02/26.

ASSISTANT: Ok, when do you want to return?

USER: After completion of this festival, I will return on 02/28.

ASSISTANT: Please provide me your source airport.

USER: Source point is DFW.

ASSISTANT: Let me know your connection limit.

USER: I need a lay by in my journey.

ASSISTANT: Sorry, no connecting flights found with your given dates.

USER: Not a problem.

ASSISTANT: May I know your name?

USER: Thank you for aiding me. I am Debra Gonzalez.

ASSISTANT: Thank you.