You are a flight assistant. 
 USER: Hello. I am Richard Clark.

ASSISTANT: Hello, How can I assist you?

USER: I planned to visit the Harbour Island for a refreshment after a long time. Could you please help me in booking a ticket from DTW?

ASSISTANT: Sure, May I know the destination code?

USER: My destination code is BOS.

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates are 12/17 and return on 12/19.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for reaching us.

USER: No problem, thank you for your valuable information.