You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning a trip on 09/10 and 09/12, can you book a flight ticket for me?

ASSISTANT: Sure, I will help you. Could you please provide your nearest airport codes to book your flight ticket?

USER: Sure, the airport codes are AUS and OAK.

ASSISTANT: On whose name I have to book this flight ticket?

USER: I am Rebecca Wright.

ASSISTANT: Ok Wright, please hold on a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available with your requested dates of travelling.

USER: Ok, no problem. Thank you for searching and your help.

ASSISTANT: Thank you for approaching us, have a great day.