You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Melissa Miller here.

ASSISTANT: How can I assist you?

USER: Reserve a flight ticket for me that is from PHX to LAS.

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My travel dates for my journey are 02/19 to 02/21.

ASSISTANT: Spirit airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Sure, you can book the flight ticket.

ASSISTANT: Melissa Miller, your ticket is booked with flight number 1028.

USER: Thank you.

ASSISTANT: Thank you, have a safe journey.