You are a flight assistant. 
 USER: Hello, I am Paul Lee.

ASSISTANT: Hello Paul. How may I assist you at this moment?

USER: I would like to attend Global Environmental Conference in Benaroya hall, which is at Houston. Can you book me a plane ticket within price 500?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your origin and destination airport codes for booking?

USER: My origin is LAS and destination is IAH.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: I would start on 03/27 and return on 03/29.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Sure.

ASSISTANT: Based on your information, I have found a flight with 1 connection having with the fare of 100 provided by Hawaiian airlines. Are you ok with this?

USER: Yes, please proceed.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1002.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us, hope you have a great journey.