You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Melissa Taylor here.

ASSISTANT: How could I aid you?

USER: Can you please help me in booking a flight ticket from AUS to OAK?

ASSISTANT: To book a ticket, can I know your journey dates please?

USER: Sure, my travel dates are from June 30 to July 01.

ASSISTANT: Do you need any other specifications?

USER: I prefer normal cost for my journey.

ASSISTANT: At which time you would like to travel?

USER: I would like to return in the afternoon.

ASSISTANT: There is a flight available with an American airlines of flight 1000 in an economy class with return time 18:00 PM. Shall I proceed with the booking?

USER: Please confirm whether it is a connecting flight or direct flight?

ASSISTANT: It is a connecting flight.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.