You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Ryan Thompson, want to book a flight ticket from DTW to BOS.

ASSISTANT: Sure, I will help you with that. Can I have your travelling dates?

USER: Sure, my trip dates are 09/09 and 09/11.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time. Please, make sure that there will be direct flight with below 200 price limit.

ASSISTANT: sorry to say that, there are no flight's available based on your travelling dates.

USER: Its ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.