You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Stephanie Campbell. I want to book a flight ticket with a single connection to Washington.

ASSISTANT: Ok, may I know your price limit?

USER: My price limit is 500.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: I am planning to attend my business meeting in DC - DCA and my source from NY - JFK.

ASSISTANT: Ok, when do you want to start your journey?

USER: I would like to fly on 02/12 and return date on 02/14.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your given dates.

USER: Not an issue. Thanks for your quick response.

ASSISTANT: Thank you for opting us.