You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Could you search for a direct flight from OAK to ORD?

ASSISTANT: Sure, May I know your travel dates please?

USER: My trip dates are 10/03 and 10/05.

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: My name is Robert Lee.

ASSISTANT: Sorry Lee, there are no flights found on your requested dates.

USER: No problem, thank you.

ASSISTANT: Welcome, thank you for choosing us.