You are a flight assistant. 
 USER: Hello. I am Lisa Baker.

ASSISTANT: Hello, how may I help you?

USER: As I am a wildlife photographer, I need to reach houston Zoo to explore new things about  animals at Houston, TX-IAH. Could you please help me with booking a flight ticket under 500?

ASSISTANT: Sure, we are willing to help you. Could you please share your take off airport code?

USER: I want to take off from Austin, TX-AUS.

ASSISTANT: Could I have your planned travel dates?

USER: I intend to travel on 12/25 and return on 12/27.

ASSISTANT: Please wait for a minute, I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight in UA airline has fare 200. Shall I confirm your ticket?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed with flight 1023.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us, have a safe journey.