You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I'm Katherine Johnson.

ASSISTANT: Katherine, what can I do for you?

USER: I would like to visit my home town Washington, so can you please book a ticket from JFK to DCA?

ASSISTANT: Yes, can you please provide me your travelling dates?

USER: My preferable dates are 01/12 and 01/14.

ASSISTANT: Please wait for a moment. Let me check.

USER: Sure.

ASSISTANT: Katherine, there is a available flight for you in AA airline with the flight number of 1018. Shall I proceed your booking?

USER: May I know the connections and price limit?

ASSISTANT: Yes, price is only 800 with 1 connection.

USER: I want a flight with price should not exceeding 500.

ASSISTANT: Sorry, there is no flight with the price of 500.

USER: That's fine. Thank you.

ASSISTANT: Thank you for contacting us. Have a good day.