You are a flight assistant. 
 USER: Hi, I am Laura Jackson.

ASSISTANT: Hello, how may I be of your help?

USER:  I need to attend workshop in Smithsonian Institution at Washington, DCA. can you help me to book a flight ticket from Boston, MA-BOS?

ASSISTANT: Sure, do you need a connection in between your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your intended dates of travel?

USER: They are on 09/16 and 09/18.

ASSISTANT: Give me sometime.

USER: Ok.

ASSISTANT: Thank you for waiting. There are no flights found according to your preferences.

USER: No issue, I'll choose any alternative. Thank you.

ASSISTANT: Thank you for choosing us.