You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you please help me in booking a flight ticket to IAD from DCA?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My travel dates are from Sept 25 to Sept 27.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Please mention your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Karen Miller.

ASSISTANT: We found a United airlines with connecting flight, and the fare of 200 in economy class. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been reserved with 1028 flight number.

USER: Thank you.

ASSISTANT: Thank you for approaching us.