You are a flight assistant. 
 USER: Hello, I am Charles Hernandez.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from ATL to OAK?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am willing to start on 05/05 and return back on 05/07.

ASSISTANT: Ok, may I know your airport codes please?

USER: Make sure that connection limit is 1.

ASSISTANT: Ok, hold on for a moment.

USER: Sure.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 200. Shall I proceed?

USER: Proceed.

ASSISTANT: Your ticket has been booked with 1003 flight number.

USER: Thank you for helping me. You are welcome.

ASSISTANT: Welcome. Thank you for choosing us.