You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking a ticket from ATL to DCA?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned departure and return travel dates are 1st and 3rd of May.

ASSISTANT: Do you have any connection limit?

USER: I need direct flight only.

ASSISTANT: Is there any other requirements?

USER: No, I don't have any other specifications.

ASSISTANT: May I know your name?

USER: Yes, my name is Matthew Williams.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, thank you so much for your time anyways.

ASSISTANT: Thank you for opting us.