You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Do you want me to help you with anything?

USER: My name is Scott Anderson. I want to book a ticket to Las Vegas-LAS to meet my car dealer for paperwork of my car. My origin airport is Austin-AUS.

ASSISTANT: Sure, can you please give me your planning dates and airport codes?

USER: My departure date is 12/17 and return on 12/19.

ASSISTANT: Wait, I will check it.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: It's ok, thanks for your help.

ASSISTANT: Thank you for providing your details.