You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me in booking a flight ticket from Washington, DCA to New York, LGA?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are from Apr 15 to Apr 17.

ASSISTANT: Ok, could I have your name please?

USER: My name is Anthony Brown.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a way station in between journey.

ASSISTANT: Ok, do you have any other specifications?

USER: No, please go with the above details.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Its ok, thank you.