You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket on 09/28 to take a part in an cultural event . Can you help me?

ASSISTANT: Sure, can you please share your arrival date?

USER: 09/30 will be my return.

ASSISTANT: Let me know your budget for flight ticket?

USER: 200 is my fare.

ASSISTANT: Please specify your boarding and landing points?

USER: DCA and LAS are my airport codes.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Can I have your name to proceed?

USER: My self John White.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, sorry, no flights available on that route.

USER: No issue. Thank you.

ASSISTANT: Thank you for availing us.