You are a flight assistant. 
 USER: Hello, my name is Patrick Lee.

ASSISTANT: Hello, how may I serve you today?

USER: I need to submit my research record in space center at Phoenix on 02/26, I want to return on 02/28. Can you help me in booking the ticket?

ASSISTANT: Ok, sure I am happy to help you. May I know your price limit?

USER: Sure, my price can be within 5000.

ASSISTANT: Can you please provide your journey codes?

USER: Ok, my city codes are ATL and PHX.

ASSISTANT: Thank you  for your details, we found a flight with number 1020 and airline Southwest at a price of 200 with 1 connection.

USER: Ok, proceed with my booking.

ASSISTANT: Sure, your ticket has been reserved.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.