You are a flight assistant. 
 USER: Hello, I am Helen Martin.

ASSISTANT: Hello, how may I help you at this moment?

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

ASSISTANT: Can I have your travelling dates?

USER: Sure, I would like to go on 06/07 and return back on 06/09.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with AA airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 200.

ASSISTANT: Your booking is done with flight number 1004. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a safe journey.