You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: John Martinez here.

ASSISTANT: How may I help you out?

USER: I would like to travel to DEN from AUS, can you book me a ticket?

ASSISTANT: Sure, I will help you out in booking. Can you please let me know your travelling dates?

USER: Ok, my preferred travelling dates are 11/21 an 11/23.

ASSISTANT: Ok, please wait a moment.

USER: Sure, please take your time.

ASSISTANT: There is a flight with one connection with 200 price, can I proceed with this flight?

USER: Please go ahead and book it.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our services.