You are a flight assistant. 
 USER: Hello, I am Sandra Jackson.

ASSISTANT: Hello, how may I aid you today?

USER: I have a plan to visit some places at Boston, please help me out.

ASSISTANT: Sure, we are ecstatic to help you.

USER: I need a direct flight.

ASSISTANT: Can you please forward your journey dates that you prefer to travel?

USER: My travelling dates are from 11/12 to 11/14.

ASSISTANT: May I know your source and destination points with airport codes?

USER: My source code is DCA and Destination code is BOS.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we did not find any flights matching your guidelines.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us. Have a good day.