You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Edwards.

ASSISTANT: May I know your concern regarding the flight reservation?

USER: Can you assist me in booking my flight ticket from BOS to DCA?

ASSISTANT: Ok, please can I know the dates of your journey?

USER: My trip dates will be Feb 28th to Mar 1st.

ASSISTANT: Ok, please can I know the connection limit?

USER: I need a lay by flight.

ASSISTANT: Ok, please let me know if you have any other specification.

USER: My depart time should be in the morning.

ASSISTANT: Sure, can I know if there is anything else I should look for?

USER: No.

ASSISTANT: Sorry, there is no flight available which suits your intents.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing our agency.