You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need you to book a flight ticket from OAK to CLT. Please help me.

ASSISTANT: Please provide your journey dates.

USER: September 3 and 5 are my planned travelling dates.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a break in between my journey.

ASSISTANT: Do you have any other specifications?

USER: I would prefer to fly in a business class flight.

ASSISTANT: May I know your name?

USER: My name is Charles Edwards.

ASSISTANT: Sorry, there are no flights available on your routes.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.