You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Can you please help me to book a ticket from ORD to DCA?

ASSISTANT: Sure, we are here to help you. Could you please help me with your journey dates?

USER: I want to start on Dec 14 and return on Dec 16.

ASSISTANT: Please let me know your connection limit?

USER: I would like to travel in a connecting flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Is there any other specifications?

USER: I want to return in the morning flight.

ASSISTANT: May I know your good name to proceed further?

USER: Dennis Johnson here.

ASSISTANT: We found a connecting flight 1018 from United Airlines has fare 100.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed in economy class and the arrival time is 6:00 hours.

USER: Thank you.

ASSISTANT: Thank you for opting us.