You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you today? May I know your good name please?

USER: My plan is to attend a autoshow which will be at Phoenix. Help me to book a ticket on 11/30. My name is Justin Evans.

ASSISTANT: Sure, we are here to help you. Can you please provide me the origin code and depart day?

USER: I need a flight from Las Vegas,NV-LAS to AZ-PHX and returning on 12/02.

ASSISTANT: Is there any other requirements in your journey details?

USER: Can you find a direct flight for Phoenix?

ASSISTANT: Ok, please wait for a while I will check the availability and get back to you.

USER: Ok.

ASSISTANT: Sorry to inform you that I found no flights in your given requirements.

USER: Thanks for the information.

ASSISTANT: Thank you for choosing us. Have a nice day.