You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I have a concert in DCA, can you please book a ticket from DTW?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travel dates are 02/17 and 02/19.

ASSISTANT: May I know your name?

USER: Myself Kevin Lee.

ASSISTANT: Here is a flight with ticket fare of 800 in AA airlines with connection 1, would you like me to proceed with the booking?

USER: No, my price limit is 500.

ASSISTANT: Sorry, there is no flight available with ticket fare 500.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, have a nice day.