You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please book a flight ticket to IAD to attend for a seminar from OAK.

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

USER: My planned journey dates are Nov 1 and 3.

ASSISTANT: Ok, do you have any specifications?

USER: I need a connected flight.

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

USER: Sure.

ASSISTANT: May I know your name please?

USER: Sure, my name is Michelle Evans.

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

USER: That's Ok, thanks for your service.

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