You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Ashley Hall, can you help me to book a flight from IAD with 500 price?

ASSISTANT: Ok, may I know your destination?

USER: My destination is DCA.

ASSISTANT: Ok, let me know your journey dates too.

USER: My travelling dates are 06/28 and 06/30.

ASSISTANT: Ok, wait a moment.

USER: Sure.

ASSISTANT: I found a flight which flies with connection 1.

USER: Book that flight.

ASSISTANT: Ok, booking is done with flight-1000 and your airline is JetBlue.

USER: Thank you.

ASSISTANT: Thanks for contacting us.