You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I oblige you today?

USER: I am planning for a round trip CA-OAK, help me in booking my flight ticket.

ASSISTANT: Sure, Can you please let me know your journey dates?

USER: My travelling dates are from 09/17 to 09/19.

ASSISTANT: Do you prefer any stopover in between your journey?

USER: Yes, I need a flag station in between the journey.

ASSISTANT: Please hold on. I will get back to you with a suitable flight.

USER: Sure.

ASSISTANT: Thanks for waiting. May I know you name?

USER: I am Nancy Johnson.

ASSISTANT: Sorry to inform you that there are no flights found with a stopover.

USER: Its ok, thank you for your service.

ASSISTANT: Thank you for contacting us.