You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Alexander Anderson, planning to visit Las Vegas to play casino. Can you please book me a ticket from DEN to LAS?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My preferable journey dates are from 06/03 to 06/05.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We have found a AA airline of 1021 flight number with one connection of cost 300.

USER: Please book my ticket with this airlines.

ASSISTANT: Your booking is done.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Your welcome.