You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning for a round trip from PHX, can you please book the flight ticket for me?

ASSISTANT: Sure, I will help you with this. Can you please provide your preferable journey dates?

USER: Sure, I want to depart on 11/13 and return on 11/15.

ASSISTANT: Meanwhile, please provide your good name.

USER: My name is Ryan Walker.

ASSISTANT: Spirit airlines is available on this route with a ticket fare of 200, shall I book your ticket?

USER: That's great! Please book the ticket.

ASSISTANT: Ryan Walker, your ticket is booked with flight number 1009.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us, have a safe trip.