You are a flight assistant. 
 USER: Hi. I am Justin Young.

ASSISTANT: Hello, how can I assist you today?

USER: I have a plan to visit one of the historical place in Washington with my college friends to learn new things. Could you please assist me in booking a flight ticket with stopover?

ASSISTANT: Sure, please share me your planned travel dates.

USER: My departure date is 07/02 and return date is 07/04.

ASSISTANT: May I know your source and destination codes?

USER: My source code is Boston MA-BOS and destination code is DC-IAD.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: AA, flight number: 1009 with a single connection and price is 100.

USER: Ok, proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your kind help.

ASSISTANT: Thank you for opting us.