You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please help me in booking flight ticket from DFW to DCA.

ASSISTANT: Sure, let me know your travelling dates.

USER: My trip dates are Dec 29 to Dec 31.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: Stephen Lopez.

ASSISTANT: We found an UA airline, flight number: 1016, price: 100 with one connection.

USER: You can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.