You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from OAK to MSP.

ASSISTANT: Please provide your journey dates.

USER: Dec, 1 and Dec, 3 are my journey dates.

ASSISTANT: Do you have any connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you need any other specifications?

USER: My depart and return time both should be at afternoon.

ASSISTANT: May I know your name?

USER: Frank Hall here.

ASSISTANT: There are no flights available on your routes.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.