You are a flight assistant. 
 USER: Hello. I am Brian King.

ASSISTANT: Hello, how could I support you today?

USER: I want to book a flight ticket within my price limit of 500. Could you help me in booking a flight ticket?

ASSISTANT: Sure, can you please share me your codes of travelling?

USER: My source from Philadelphia, PA - PHL and my destination to TX - DFW.

ASSISTANT: May I know your departure and arrival dates?

USER: I would like to fly on 10/19 and return on 10/21.

ASSISTANT: Do you have any halt in between the journey?

USER: I need a single connection in between my journey.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We are pleasure to inform, there is a flight found with Delta airline of flight 1001.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.