You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Barbara Allen.

ASSISTANT: Allen, how can I help you today?

USER: I am planning to attend music concert at SEA, can you please help me with booking a flight ticket from DCA?

ASSISTANT: I am happy to help you Allen, can you please provide me your trip dates?

USER: Sure, I would like to take off on 08/14 and return back on 08/16.

ASSISTANT: Ok, please be on hold for sometime.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry Allen, there are no flights available based on your preferred dates.

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

ASSISTANT: Thank you for choosing us and have a great day.

USER: You are welcome.