You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am planning to visit Washington, can you please book me a ticket from DTW to DCA?

ASSISTANT: Sure. May I know your travelling dates?

USER: My preferable journey dates are from Nov 28 to Nov 30.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight.

ASSISTANT: May I know your good name?

USER: My name is Nicole Roberts.

ASSISTANT: You have a flight 1012 in Delta airline and price 100 with a connection, Shall I proceed?

USER: That's ok, please book my ticket in this flight.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you.