You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please help me to book a flight ticket from DFW to LAX.

ASSISTANT: May I know your trip dates?

USER: My travel dates are Mar, 25 and Mar, 27.

ASSISTANT: Do you have any connecting flight preferences?

USER: I need connecting flight.

ASSISTANT: Is there any other concern?

USER: No.

ASSISTANT: May I know your name please?

USER: Kevin Wilson.

ASSISTANT: United Airlines is providing the connecting flight and the fare of 300. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1025.

USER: Thank you.

ASSISTANT: Thank you for choosing us.