You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in booking my flight ticket from AUS to EWR?

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates will be June 4th to June 6th.

ASSISTANT: Can I know your preferred connection limit?

USER: I need a direct flight.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I am Donna Nelson.

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

USER: Its ok, I will choose another alternative.

ASSISTANT: Thank you for contacting us.

USER: Thank you.