You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to book a flight ticket from DTW to BOS.

ASSISTANT: Ok, can you please provide your travelling dates?

USER: Sure, my journey dates are Jun 17 and Jun 19.

ASSISTANT: Ok, do you have any specifications?

USER: I need a connected flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. May I know your name please?

USER: Sure, Sarah Robinson here.

ASSISTANT: Sorry Sarah Robinson, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.