You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to visit San Francisco, can you book a flight for me?

ASSISTANT: Sure, I will assist you with that. Could you please mention your preferable travel dates?

USER: I will fly on Oct 28 and return on Oct 30.

ASSISTANT: May I know your preferable airport code names for further process?

USER: My source point is ATL and my destination is SFO.

ASSISTANT: May I know your name for further process?

USER: My name is Catherine Carter.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer a single connection flight.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Spirit airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: Please proceed with booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1016.

USER: Thank you for helping me.

ASSISTANT: You are welcome Catherine Carter.