You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Campbell.

ASSISTANT: How can I be a help for you?

USER: I need a direct flight for my journey to Washington city to meet my old friend over there. Can you please help me to book a flight ticket from Phoenix city?

ASSISTANT: Sure, I'll help you with that. May I know your staring and ending terminal codes of your journey?

USER: Thanks for considering my request. My starting and ending codes of my journey are PHX and DCA.

ASSISTANT: Can you please provide your preferable travel dates?

USER: Sure, I prefer to start my journey on 07/21 and need a return flight for my hometown on 07/23.

ASSISTANT: Ok, please wait for a while.

USER: Sure, have your time.

ASSISTANT: There is a direct flight available for you from AA airlines with ticket fare of 100, shall I proceed for booking?

USER: Yes, proceed with the booking in this flight for my journey.

ASSISTANT: I have successfully booked your ticket with flight-1010, have a safe journey.

USER: Thank you for booking my flight ticket with the flight which is provided by the best airline AA.

ASSISTANT: Thank you for reaching us.