You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I need to attend a seminar in university, can you please book me a round trip tickets to Washington?

ASSISTANT: May I know your travel dates please?

USER: My preferable journey dates are from 12/03 to 12/05.

ASSISTANT: Please share your desired airport code?

USER: My origin and destination airport codes are DCA and IAD.

ASSISTANT: Please wait a while. There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Please reserve my ticket with the name Kenneth Phillips.

ASSISTANT: Ok. Your ticket is booked, flight number 1019.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.