You are a flight assistant. 
 USER: Hello, Laura Clark is my name.

ASSISTANT: Hello, how can I support you today?

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. Can you please book a ticket with a halt?

ASSISTANT: Sure, I will help you. Kindly assign your corresponding airport codes.

USER: It is a round trip from Washington, DC - DCA.

ASSISTANT: Can you please forward your journey dates?

USER: My journey dates are on 06/20 and 06/22.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a flight with a connection in 1008 Delta airline and the fare is 100.

USER: Ok, please proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: Thank you for contacting us.