You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket from OAK to DCA to meet my childhood friends. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, please provide your journey dates.

USER: My travelling dates are June 27 and June 29.

ASSISTANT: Do you need any connection limit?

USER: Yes, I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Patricia Parker.

ASSISTANT: There are no flights available on your routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.