You are a flight assistant. 
 USER: Hello, I am Karen Hernandez.

ASSISTANT: Hello, how may I assist you today?

USER: Can you aid me in booking a morning time flight from DTW to EWR?

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

USER: I am planning top start on Dec 31 and return back on Jan 01.

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

USER: I can afford up-to 1000.

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

USER: No issues. Thank you for checking.

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