You are a flight assistant. 
 USER: Hello, James Lee here.

ASSISTANT: Hello. How  can I serve you?

USER: I need to book a ticket with a price around 500.

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Sure, I wish to travel from March 21 to 23.

ASSISTANT: Please share me your source and destination airport codes.

USER: ATL and MSP are the codes.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: I need a economy class in my journey.

ASSISTANT: We found a Delta airline, flight number:1013 and the price is 100.

USER: I even need to have a halt in my journey.

ASSISTANT: Its a connecting flight. Can I reserve it?

USER: Awesome! Please book it.

ASSISTANT: Your flight ticket has been reserved with economy class.

USER: Thank you very much for your help.

ASSISTANT: Thank you for choosing us.