You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am  Christopher Edwards. I want to book a flight ticket from OAK to ORD. Could you help me in booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are from Jan 16 to Jan 18.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.