You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket on 07/02 and return ticket on 07/04 as I am going to visit Freedom Park at Charlotte.

ASSISTANT: May I know your airport codes?

USER: My source and destination airport codes are from DFW to CLT.

ASSISTANT: Here is a flight with UA airlines and price 100.

USER: Ok, please proceed with booking.

ASSISTANT: Ok, your ticket has been booked. Thank you for reaching us. May I know your name?

USER: Thank you for helping me. Sure, my name is Kenneth Edwards.