You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Brown.

ASSISTANT: Brown, how can I aid you today?

USER: I have to attend a Live Concert at Las Vegas, could you please help me with booking a flight ticket from PHX to LAS?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I would like to depart on Apr 2nd and return on Apr 4th.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure, take your time.

ASSISTANT: Sorry Brown, there are no flights available on your requested dates.

USER: Ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.