You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Brown.

ASSISTANT: How can I aid you at this moment?

USER: I need to book a ticket from IAD to DCA, can you help me?

ASSISTANT: Sure, I will aid you with that. Could you please mention your preferable dates?

USER: My travelling dates are July 29 to July 31.

ASSISTANT: Do you have any another specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please hold on a moment, I will check flight availability in this route.

USER: Sure take your time.

ASSISTANT: There is a AA airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: Please proceed with booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1013.

USER: Thank you.

ASSISTANT: You are welcome Richard Brown.