You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

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

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: I want to travel on Apr 21 and Apr 23.

ASSISTANT: May I know your name for further process?

USER: My name is Donald Edwards.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I prefer a connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: JetBlue airline flight available with connection limit 1 and fare is 300, shall I confirm this economy class flight?

USER: You can proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1003.

USER: Thank you.

ASSISTANT: You are welcome Donald Edwards.