You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Ashley Brown. I am planning to attend music concert at DFW, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure Brown, please provide me your journey dates.

USER: Sure, I would like to take off on 01/20 and return back on 01/22. Please make sure that the connection limit is 0.

ASSISTANT: Brown, there are no flights available at this moment with your preferences.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.