You are a flight assistant. 
 USER: Hi, I am Roberts Gonzalez.

ASSISTANT: Hello, how can I serve you for the day?

USER: I have an appointment with my family doctor at Charlotte, please book a connecting flight ticket.

ASSISTANT: Sure, please share me your journey dates?

USER: My depart date is on 12/22 and return date is on 12/24.

ASSISTANT: Can you please help me with your airport codes?

USER: My origin airport code is IL- ORD and return airport code is NC- CLT.

ASSISTANT: How much you can spend for airfare?

USER: I need the ticket within price 5000.

ASSISTANT: Ok, please wait for a minute.

USER: ok.

ASSISTANT: Thank you for waiting. We found a flight with Southwest airlines, flight number 1007, price is 100 with single connection. Shall I proceed to booking?

USER: Please go with booking.

ASSISTANT: Your booking has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us. Have a great day.