You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I need to book my ticket from ATL to DCA. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, I am happy to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are from Nov 29 to Dec 01.

ASSISTANT: Do you have any other requirements?

USER: I would like to book my ticket in economy class with connecting flight.

ASSISTANT: May I know your name?

USER: Sure, my name is Carol Rodriguez.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thank you for approaching us.