You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from JFK to OAK. Could you book a ticket?

ASSISTANT: Sure, may I know the travelling dates?

USER: My travelling dates are from Dec, 1 to Dec, 3.

ASSISTANT: Do you have any connection limit?

USER: I would prefer direct flight.

ASSISTANT: May I know your name?

USER: I am Ruth Allen.

ASSISTANT: Sorry, no flights found with your chosen dates.

USER: Thank you.

ASSISTANT: Thank you for opting us.