You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: Dorothy Turner here. I am a model, I have to take part in a beauty contest at Los Angeles. Could you book my ticket from Las Vegas?

ASSISTANT: Sure, we would be glad to help you.

USER: Thanks.

ASSISTANT: Could you please help me with your preferable dates to travel?

USER: My itinerary dates are 03/10 and 03/12.

ASSISTANT: Ok, may I know the airport code of Las Vegas?

USER: My genesis and terminus airport codes are LAS and LAX.

ASSISTANT: Ok, do you prefer a halt in between your journey?

USER: I prefer 1 halt.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, we are unable to provide flight in between your journey routes due to some technical upgradation at destination airport.

USER: No problem, I will find an alternative way to travel.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your assistance.