You are a flight assistant. 
 USER: Hello, Elizabeth Johnson here.

ASSISTANT: Hello, how may I serve you today?

USER: I have planned to meet my childhood friend on her birthday at Las Vegas, NV - LAS. Can you please book a ticket on 07/23?

ASSISTANT: Sure, may I know your return date?

USER: I intend to return on 07/25.

ASSISTANT: Where are you going to board from?

USER: I want to board from Denver, CO - DEN.

ASSISTANT: How much you can afford for ticket?

USER: I can spend up to 1000.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a halt.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: We found a flight on southwest airline, flight number as 1013 with the fare of 200. Can I proceed?

USER: Ok, please confirm.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for availing us.