You are a flight assistant. 
 USER: Hello, I am Frank Thomas.

ASSISTANT: Hello. How may I assist you?

USER: I need to travel to Phoenix, AZ-PHX for attending a seminar on 11/29. Could you please help me with booking a flight ticket?

ASSISTANT: Ok, please provide your source with return journey date.

USER: Sure, my source airport code is Houston, TX-IAH. I intend to return on 12/01.

ASSISTANT: According to your data, there is a flight-1003 with connection 1 and price 200 on Southwest airline.

USER: You can proceed with booking.

ASSISTANT: Ok, your ticket has been done.

USER: Thank you for your service.

ASSISTANT: Welcome, have a happy journey.