You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I address you today?

USER: I want to head from Washington to attend a international conference regarding global warming at Philadelphia. Can you help me book a connecting flight?

ASSISTANT: Sure,how much you can afford for ticket fare?

USER: I can pay up-to 500.

ASSISTANT: May I know your name please?

USER: Frank Mitchell is my name.

ASSISTANT: Can I know your exact airport attributes?

USER: My journey is from DCA to PHL.

ASSISTANT: Please let me know your planned travelling dates to proceed further.

USER: I intend to fly on 06/26 and return on 06/28.

ASSISTANT: Just a moment I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a Southwest airline matching your essential details with one connection and the fare 100.

USER: Book my ticket with this airline.

ASSISTANT: Your seat is reserved with the flight number-1001.

USER: Thank you for helping me with the booking.

ASSISTANT: Thanks for choosing us.