You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need a connecting flight to Boston in the month of October from Washington. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know the planned travel dates?

USER: Yes, my planned travel dates are Oct 01 and Oct 03.

ASSISTANT: Please provide me the airport codes to check for the flight availability?

USER: Ok, my airport codes are DCA and BOS.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need an economy class flight with normal-cost airlines and need to have a return flight in the afternoon.

ASSISTANT: Please provide me the name to reserve the ticket.

USER: Ok, my name is Sarah Adams.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.