You are a flight assistant. 
 USER: Hello, Richard Martinez here.

ASSISTANT: Hello, welcome to Universal Travel Agency. How may I serve you?

USER: I heard that Austin is a best place to visit so, I want to book a ticket on 04/04.

ASSISTANT: Sure, can I know on which date you want to return?

USER: I want to return on 04/06.

ASSISTANT: Ok, can I know the codes of your airport?

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

ASSISTANT: There is a airlines called Frontier, would you like me to book your ticket, are you ready to move in little bit costlier flight?

USER: My price limit is 500 with single connection.

ASSISTANT: Ok, then this lift is meeting all your limitations, shall I proceed?

USER: Sure, you can proceed.

ASSISTANT: Your ticket is been confirmed, service number is 1026.

USER: Thanks for booking.

ASSISTANT: Thank you for reaching our agency.