You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Karen Parker want to attend a workshop at New York, can you book a ticket with price under 200?

ASSISTANT: Sure Parker, may I know your planned journey dates please?

USER: Sure, my travelling dates will be 12/06 and 12/08.

ASSISTANT: Can you please provide me your airport codes?

USER: Yes, I want to fly from DCA to JFK.

ASSISTANT: Please give me a minute.

USER: Ok.

ASSISTANT: Parker, there are no flights available at this moment.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.