You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Evans here.

ASSISTANT: How may I assist you?

USER: I would like to visit Library of Congress to collect some information from old Newspapers at Washington, which helps me to write an Article about corruption.

ASSISTANT: Ok.

USER: Can you please help me with booking a connecting flight?

ASSISTANT: Sure, may I know your airport code?

USER: Yes, LAX and DCA are my airport codes.

ASSISTANT: May I know your travel dates?

USER: Yes, I have planned to go on 10/25 and I will come back on 10/27.

ASSISTANT: Do you need any specification?

USER: I have already mentioned that I need a connecting flight.

ASSISTANT: There is no flight on your details.

USER: No issue, thank you.

ASSISTANT: Thank you so much.