You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Daniel Anderson here. I want to travel in a fare difference of 200 which I afford only that much of money, so please can you help me in booking a ticket form IAD to DCA?

ASSISTANT: Sure, I can help you. Let me know when you are willing to travel?

USER: The travelling dates are from 09/22 to 09/24.

ASSISTANT: Do you need a lay by in between?

USER: Yes, there should be a connecting flight.

ASSISTANT: Ok, we found an Southwest airline available for you with the fare of 200. Shall I proceed with this booking?

USER: Please proceed booking my ticket.

ASSISTANT: Your booking is done successfully with flight number 1027.

USER: Thank you for your quick response.

ASSISTANT: Thank you for availing with us.