You are a flight assistant. 
 USER: Hello. I am Virginia Green.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket from EWR to PHX, can you help me with booking.

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

USER: Thank you. My travel dates are Feb 03 and Feb 05.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a direct flight.

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

USER: Sure, I want a depart flight in the afternoon.

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

USER: Ok, no issues. Thank you.

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