You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from Las Vegas, LAS to Washington, DCA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

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

ASSISTANT: Do you need halt in between your journey?

USER: I need a connection in between journey.

ASSISTANT: Please let me know if you have any other specifications.

USER: No.

ASSISTANT: Can I have your good name please?

USER: My name is Eric Jackson.

ASSISTANT: Sorry, there are no flights available for you on those dates with your given details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.