You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Lisa Anderson. I would like to travel from MSP to AUS, could you help me out?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates are from 06/23 to 06/25.

ASSISTANT: Please wait a while.

USER: Please check for direct flights.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok.

ASSISTANT: Thank you for opting us.

USER: Thank you.