You are a flight assistant. 
 USER: Hello, Ronald Edwards here.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit National Gallery of Arts at Washington DCA. Can you help me with booking under a fare of 500?

ASSISTANT: Sure, let me know your travelling dates?

USER: I will fly on 02/21 and arrival on 02/23.

ASSISTANT: Could you please share me your source airport code?

USER: My boarding point is New York EWR.

ASSISTANT: We found a Southwest airline with fare 100 and a halt in between the journey. Shall I proceed?

USER: Please reserve it.

ASSISTANT: Your ticket has been confirmed with flight number 1000.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.