You are a flight assistant. 
 USER: Hello, I am Brain Davis.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me to book a flight ticket from OAK to ATL?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are Sept 27 to Sept 29.

ASSISTANT: Ok, any other requirements to be met?

USER: I would like to return in the afternoon.

ASSISTANT: Any class preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection of flight.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for connecting with us.