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

ASSISTANT: Hello, how can I assist you today?

USER: I want to meet my aunt at Washington, so I want to travel from Boston. Can you please book me a direct flight?

ASSISTANT: Sure, Can you provide me your trip dates please?

USER: Yes, my travelling dates are 06/19 and 06/21.

ASSISTANT: May I know your source point and destination point?

USER: Sure, my airport codes are MA-BOS and DC-DCA.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Unfortunately there is no flights found on your details. Thanks for connecting us.

USER: That's ok, thank you for the response.