You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Justin Martin.

ASSISTANT: How can I assist you?

USER: I am planning to for a round trip from LAS to LAS, can you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know your travel dates?

USER: Sure, I would like to take off on 04/04 and return back on 04/06.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: You are welcome.