You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Need your assistance for booking from ORD with a direct flight.

ASSISTANT: Sure, May I know the destination code?

USER: Sure, it is ORD.

ASSISTANT: May I know the travelling dates?

USER: My scheduled dates are on Oct 21 and 23.

ASSISTANT: Do you have any connection limit?

USER: I have already mentioned.

ASSISTANT: Sorry, Is there any other requirements?

USER: My depart time is afternoon.

ASSISTANT: May I know your name?

USER: Elizabeth Lopez is my name.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thanks for your service.