You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what service you are expecting from us?

USER: I want to visit Austin Zoo, can you help me to book a direct flight?

ASSISTANT: Sure, can you help me with the airport codes that you want to travel?

USER: Yes, I want to travel from BOS to AUS.

ASSISTANT: Ok, when you are willing to travel to Austin?

USER: I would like to have my journey on 03/24 and 03/26.

ASSISTANT: Ok, please wait a moment. I will check the flight and revert back to you.

USER: Sure.

ASSISTANT: There is a flight which is matching to your requirements, the airlines is AA having a price limit 200. Can I book your ticket to this airlines?

USER: Ok, proceed with this airline.

ASSISTANT: Ok, can I have your name to book the ticket please?

USER: Sure, my name is Joseph Brown.

ASSISTANT: Ok Brown, your ticket is confirmed with the flight number 1010.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for choosing our services.