You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Hill.

ASSISTANT: How can I help you?

USER: I want to  book a flight ticket to Phoenix AZ-PHX, help me in booking my flight ticket from Washington DC-DCA.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: 06/30 is my starting date, my return date is on 07/02.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: There is a flight 1029 in Spirit airline and price 100 with a connection.

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.