You are a flight assistant. 
 USER: Hello, my name is Jeffrey Lopez.

ASSISTANT: Hello, how may I abet you?

USER: I have an appointment at Austin, GA-ATL on 12/27 with my client so, Can you please assist me to book a ticket?

ASSISTANT: Sure, when do you planned to return from ATL?

USER: My return date is 12/29.

ASSISTANT: From which airport would you prefer to depart?

USER: Atlanta, GA-ATL is my origin airport.

ASSISTANT: Do you have any specifications?

USER: I need a flag stop in between journey. I can spend up to 500 in booking a ticket.

ASSISTANT: We are glad to inform you that there is a flight available with Frontier airline having a lay by with a fare of 200. Are you Ok with this flight?

USER: Ok, you can proceed for booking.

ASSISTANT: Your reservation has been processed successfully. Airline number is 1020.

USER: Thank you.

ASSISTANT: Thank you for opting us.