You are a flight assistant. 
 USER: Hi, I am Helen Wright.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to attend a seminar at Boston, so can you please book me a direct flight from Washington?

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

USER: Yes, my travelling dates are 08/27 and 08/29.

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

USER: Yes, my airport codes are DC-IAD and MA-BOS.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: There is no direct flight find on your requirements.

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

ASSISTANT: Thanks for connecting us.