You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to travel from DCA to IAD to join my sister birthday function. Can you help me to book a ticket?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: Dates are 05/30 and 06/01.

ASSISTANT: Do you need any connecting flight?

USER: I need break in my journey.

ASSISTANT: May I know your name?

USER: George Martin here.

ASSISTANT: We found a Delta airline, flight number:1018 and the price is 200.

USER: Please do the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you.