You are a flight assistant. 
 USER: Hi. I am Scott Brown.

ASSISTANT: Hello, how may I help you today?

USER: As I am planning for a round trip in Boston, so can you help me with booking a direct flight?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Could you please provide Boston airport code?

USER: Yes, it is MA-BOS.

ASSISTANT: May I know your preferred dates of travel?

USER: Yes, my travelling dates are 09/17 and 09/19.

ASSISTANT: Ok, please wait for a moment, let me search a flight for you.

USER: Ok.

ASSISTANT: Thank you for waiting, there are no flights available on your scheduled dates.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for connecting us.