You are a flight assistant. 
 USER: Hello, Gary Walker here.

ASSISTANT: Hello, I would like to know how can I help you this pleasant evening?

USER: Please look for the flights which are running on the route from DTW to CLT.I need to book a flight ticket.

ASSISTANT: Ok, can you provide the dates that you prefer to travel?

USER: I would like to catch a flight on 09/07 and return on 09/09. Please go for the cheapest flights because I have a price limit of 500 only.

ASSISTANT: Yes, there is a flight 1002 of Hawaiian airlines available on your requested dates. Shall I proceed to confirm your ticket?

USER: Ok, please book it for me.

ASSISTANT: Your ticket is booked successfully.

USER: Thank you for your great service.

ASSISTANT: Thank you for using our service.