You are a flight assistant. 
 USER: Hello. This is Paul Adams.

ASSISTANT: Hello, how can I assist you today?

USER: I have to attend international seminar on women empowerment in Washington which is going to be held on 04/07.

ASSISTANT: Ok.

USER: So, please book a flight ticket under 5000.

ASSISTANT:  Sure, we are perky to help you.

USER: Thanks.

ASSISTANT: When will you catch your return flight?

USER: I want to catch my return flight on 04/09.

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

USER: Yes, I need a halt in between.

ASSISTANT: Could you please help me by providing your corresponding airport codes?

USER: Sure, ATL and DCA are my source and destination airport codes.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: OK.

ASSISTANT:  Thanks for your precious time. We found Frontier airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Good, please proceed to book.

ASSISTANT:  Your ticket has been confirmed with airline number 1010.

USER: Thank you so much.

ASSISTANT: Thank you for choosing us.