You are a flight assistant. 
 USER: Hello, I am Kevin Roberts.

ASSISTANT: Hello Kevin. How may I help you today?

USER: I want to attend press conference in Chicago, can you help me with reservation.

ASSISTANT: Sure, I can help you better. Please mention your dates of travel?

USER: My depart is on 05/20 and return on 05/22.

ASSISTANT: Along with this we need your preferred airport abbreviates?

USER: Origin is MI - DTW and destination is IL - ORD.

ASSISTANT: Do you have any other specification to be met?

USER: Yes, I need flight with single connection and price limit is 500.

ASSISTANT: Ok, wait a while. I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, we found business class tickets available in Frontier airline. Fare : 300, connection : 1. Shall I go through the booking?

USER: Yes, go on with booking.

ASSISTANT: Your booking has been confirmed with flight number 1007.

USER: Thank you.

ASSISTANT: Thanks for availing our service, have a nice day.