You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need to travel DCA and ORD, can you please reserve flight ticket?

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

USER: My travelling dates are Nov,12 and Nov,14.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My depart time should be in the afternoon.

ASSISTANT: Is there any other requirements regarding your journey?

USER: I prefer one connecting flight.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: Myself Eric Hernandez.

ASSISTANT: There are no flights available on this route as per your travel dates.

USER: Oh! Sad to hear that. Anyway, I will reach another booking agency.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for the information.