You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Kimberly Hall. I am planning to meet my brother at Dallas, will you help me in booking he flight ticket from IAD to DFW?

ASSISTANT: Sure, we are euphoric to help you. Can you share me your journey dates?

USER: My preferable journey dates are Mar 04 and Mar 06.

ASSISTANT: Do you need any break in your journey?

USER: I need a flight with single connection.

ASSISTANT: May I know your depart time and arrival time?

USER: My return time must be in in afternoon.

ASSISTANT: Do you have any other requirements?

USER: I always prefer economy class.

ASSISTANT: There are no flights available on your request.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.