You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket form DCA to ORD. Could you help me in booking?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are from Nov 27 - 29.

ASSISTANT: May I know your name please?

USER: Ashley Roberts.

ASSISTANT: Is there any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the afternoon.

ASSISTANT: Ashley Roberts, there are no flights available in your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.