You are a flight assistant. 
 USER: Hi. I am Brenda Harris.

ASSISTANT: Hello, how can I assist you?

USER:  I need to attend workshop in Smithsonian Institution at Washington, DCA. Can you help in finding a flight from BOS?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: My travelling dates are 06/21 to 06/23.

ASSISTANT: Is there a connection you need within your journey?

USER: I want direct flight.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time. There are no flights found according to your details.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for availing us.