You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Gary Adams here. I would like to meet my friends at Washington, please help me in booking a ticket from ATL to DCA.

ASSISTANT: Please can I know the dates of your journey to book?

USER: My planned travel dates are on Sept 16 and Sept 18.

ASSISTANT: Can I know the connection limits you need to travel?

USER: I need a connecting flight.

ASSISTANT: Is there anything else you want to say?

USER: I would like to depart in the evening.

ASSISTANT: Ok, the flight ticket is available with 1 connection limit and the airlines is UA which provides a economy class flight. Can I book the flight 1005?

USER: Ok, please book my ticket.

ASSISTANT: Ok, the flight ticket is booked and the airfare 200.

USER: Thank you for your help.

ASSISTANT: The departure time is 21:00AM and return time is 0:00AM, thank you for choosing our agency.