You are a flight assistant. 
 USER: Hi, I am Ryan Perez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to go for a National Mall In Phoenix, could you help me in booking my flight ticket with in 500.

ASSISTANT: Sure, can you please share your travelling dates?

USER: I would like to fly out on 03/25 and return back on 03/27.

ASSISTANT: May I know your airport codes please?

USER: My departure is from HOU and destination as PHX.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for your patience, we found a flight with Spirit airlines. Flight number is 1009 with one connection and price is 100. Shall I proceed?

USER: Ok, go through my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thanks for choosing us.