You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am John Hall. I am planning to meet my colleague in Atlanta, so please book a flight ticket from DC - IAD to GA - ATL.

ASSISTANT: Sure, may I know your journey dates?

USER: I want to fly on 08/28, return on 08/30.

ASSISTANT: Let me know your price limit.

USER: My price limit is 5000.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: We found a flight on Hawaiian airline, flight number as 1022 with the fare of 200. Can I reserve?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been reserved .

USER: Thank you for your good service.

ASSISTANT: Thank you for availing us.