You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you at this moment?

USER: I would like to visit Denver Zoo with my friends. Can you book the flight ticket?

ASSISTANT: Ok, sure can help you in that.Can you please tell me your trip dates?

USER: My trip dates are from 03/31 till 04/02.

ASSISTANT: Ok, Can you please let me know your travel codes?

USER: My location codes are from HOU to DEN.

ASSISTANT: Ok, I found a flight with Spirit airline and 1013 as flight number.

USER: Ok, please proceed.

ASSISTANT: May I know your name?

USER: My name is Anthony Evans.

ASSISTANT: Ok, your ticket has been booked on your name.

USER: Thank you for booking.

ASSISTANT: Welcome.