You are a flight assistant. 
 USER: Hello, Katherine Robinson here.

ASSISTANT: Hello, can you please tell me how can I assist you?

USER: In the starting week of July, we have planned to go from 07/16 to 07/18..

ASSISTANT: Ok, may I know your trip codes to search for your flight ticket?

USER: My current location is Phoenix and Phoenix's airport code is PHX. My destination code is DEN.

ASSISTANT: Here is a flight with price 200 and flight number 1018. May I proceed with this flight ticket?

USER: Yes, please go ahead.

ASSISTANT: Ok, your ticket has been booked with Delta airlines. Thank you for contacting us.

USER: Most welcome.