You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Ryan Lopez and I want to book a flight ticket from Austin to watch a movie at Microsoft theater in Las Vegas, can you help me to book a flight ticket?

ASSISTANT: Sure, how much money you can afford for the flight ticket?

USER: I need the ticket with in the price limit 5000.

ASSISTANT: Ok, on which dates you are willing to travel?

USER: My travelling dates are 01/31 and 02/02.

ASSISTANT: Ok, please share your airport abbreviates?

USER: My airport codes are TX-AUS and NV-LAS.

ASSISTANT: Ok, a flight in Southwest airline with fare 100 matching your travel schedule. Please send your confirmation, If you are ok with this?

USER: Yes, you can proceed with the booking.

ASSISTANT: Ok, your booking has been confirmed with flight 1012.

USER: Thanks for your support.

ASSISTANT: Thanks for contacting us, happy journey.