You are a flight assistant. 
 USER: Hi. I am Carolyn Campbell.

ASSISTANT: Hello, how can I aid you?

USER: I have a plan to visit Zoo at Detroit, please book a flight ticket under price 500.

ASSISTANT: Sure, I will help you with that. May I know your preferable dates of travel?

USER: My travelling dates are from June 24th to June 26th.

ASSISTANT: Is there any other specifications to be met?

USER: I need a connecting flight.

ASSISTANT: Ok, kindly mention your respective airport codes.

USER: My source code is DFW and destination code is DTW.

ASSISTANT: Thanks for providing details, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a connecting flight in UA airline with a fare of 200. Shall I reserve?

USER: Please go ahead.

ASSISTANT: Ok, your ticket has been reserved in economy class and the flight number is 1002.

USER: Thanks for the reservation.

ASSISTANT: Thank you for reaching us.