You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I help you?

USER:  I am Elizabeth Harris want to attend a meeting at DC-IAD. Can you book a ticket from DC-DCA.

ASSISTANT: Sure, please share me your dates of journey?

USER:  My travel dates are 09/20 and 09/22.

ASSISTANT: Do you have any other requirements?

USER:  I need a connecting  flight.

ASSISTANT: Thanks for waiting, we found a flight with AA airline of flight number 1007 with price 200.

USER: Ok, you can reserve my ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you.