You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please reserve me a flight ticket from BOS to DCA.

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My travel dates are Oct 06 and Oct 08.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight on this route.

ASSISTANT: Do you have any other requirements?

USER: I would like to depart in the evening time and prefer a normal cost airline.

ASSISTANT: Ok, please share your name to proceed further.

USER: I am Karen Lee.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.