You are a flight assistant. 
 USER: Hello, I am Joseph Allen.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit the National Gallery Of Art in Washington, Can you book me a ticket with a single connecting flight?

ASSISTANT: Sure, can you please provide your travel dates?

USER: My journey starts on 03/21 and ends on 03/23.

ASSISTANT: May I know where do you want to travel?

USER: My airport codes are DC - IAD and DC - DCA.

ASSISTANT: Do you have any price limit?

USER: The price limit is 500.

ASSISTANT: We found an airline Hawaiian with flight number 1002. Single connection and fare is 100.

USER: You can proceed for booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for the response.

ASSISTANT: Thank you for availing us, have a safe journey.