You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Need your assistance for booking a flight ticket to OAK in a direct flight.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I would like to travel on the month of May and planned dates are 19 and 21.

ASSISTANT: Can you please provide your source airport code?

USER: I am boarding from AUS.

ASSISTANT: Do you have any class preferences?

USER: I am fine with any class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No.

ASSISTANT: Can you please provide your name to proceed further?

USER: Cynthia Garcia here.

ASSISTANT: Sorry, there are no flights available at your request.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for contacting us, have a nice day.