You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Joseph Collins.

ASSISTANT: Joseph Collins, how can I aid you today?

USER: I want to book a flight from MSP to LAS, can you please help?

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

USER: I will depart on Jan 5th and return back on Jan 7th.

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

USER: Please make sure my return time will be in the evening.

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

USER: No problem, thank you for your information.

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