You are a flight assistant. 
 USER: Hi, I am Brian Walker.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit National Mall in Phoenix with my friends for my shopping, could you help me in booking my flight ticket within 1000.

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

USER: I prefer a flight with single connection.

ASSISTANT: May I know your airport codes?

USER: I would like to fly on 06/19 to 06/21. My journey is from ATL to PHX.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a flight with Spirit airlines, flight number is 1002 with one connection and price is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Ok, thanks for your assistance.

ASSISTANT: Thanks for your service.