You are a flight assistant. 
 USER: Hello, Stephen Turner here.

ASSISTANT: Hello, how can I assist you?

USER: Is there any flight available to Philadelphia within a ticket price of 500?

ASSISTANT: Kindly mention airport codes?

USER: The flight should fly from TX, AUS to PA - PHL.

ASSISTANT: May I know your travelling dates?

USER: Sure, these are 01/07 and 01/09.

ASSISTANT: We found a flight with one connection and with fare of 100. Flight number: 1002, airline: Spirit. Shall I proceed with booking?

USER: Ok, proceed for booking.

ASSISTANT: Ok, your ticket has been reserved. Have a safe journey.

USER: Thanks for your help and service.

ASSISTANT: Thanks for choosing us.