You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from Phoenix to attend an interview in Atlanta, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, let me know your travelling dates.

USER: I would like to depart on Sept 19th and my return date will be on Sept 21st.

ASSISTANT: Please share your airport codes.

USER: My boarding and landing airport codes are PHX and ATL.

ASSISTANT: Do you have any class preference?

USER: No, I don't have any class preference.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Gary Anderson.

ASSISTANT: We found an Southwest airlines with single connection and flight number is 1013. Shall I proceed?

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for choosing us.