You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: Please book a ticket from Detroit, MI-DTW to Washington DC-IAD.

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 01/06 to 01/08.

ASSISTANT: Do you have any preferences?

USER: Price limit 200.

ASSISTANT: May I know your good name?

USER: I am Gregory Hill.

ASSISTANT: There is a flight 1019 in Southwest airline and price 100 with a connection. Shall I proceed?

USER: Please book a ticket.

ASSISTANT: Reservation is done. Thank you.

USER: Thanks.