You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Joshua Davis. I need a reservation to meet my project manager. Can you please book a ticket with a price limit of 1000?

ASSISTANT: Sure, may I know your source and destination codes?

USER: My airport codes are from DTW to CLT.

ASSISTANT: May I know your planned travel dates?

USER: My travel dates are on 12/18 and 12/20.

ASSISTANT: Please wait for a moment. I will check the availability of the flights.

USER: Ok.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1020 and price is 100.

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.