You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. I hope you are good today, how can I help you?

USER: Thanks. I am Mark Adams from Las Vegas. I have to go to Denver next month, can you please book a flight ticket for me?

ASSISTANT: Sure Mark, please  provide me your airport codes.

USER: I want to fly from LAS and destination airport is DEN.

ASSISTANT: May I know your travel dates please?

USER: I want to take off on 07/02 and book my return ticket also on 07/04.

ASSISTANT: There is a flight 1005 of Delta airlines available on your route.

USER: I am ok with this flight, please proceed.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Most welcome.