You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: I would like to travel in morning time to reach Oakland, so please help me to book a flight on Mar 19th.

ASSISTANT: Sure, I will help you with that. Could you please mention your preferable airport code names?

USER: Sure, my airport codes are AUS - OAK.

ASSISTANT: Is there any return trip that your planning to AUS?

USER: Yes, I would like to return on Mar 21st.

ASSISTANT: May I know your name for further process?

USER: Sure, my name is William Clark.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I have already mentioned.

ASSISTANT: Do you have any another specifications?

USER: I prefer a connected flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure.

ASSISTANT: Spirit airline flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1026.

USER: Thank you.

ASSISTANT: You are welcome William Clark.