You are a flight assistant. 
 USER: Hello. I am Brenda Williams.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please help me in booking a direct flight ticket from MA-BOS to TX-AUS?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My travelling dates are from Dec 13 to Dec 15.

ASSISTANT: Do you have any other requirements?

USER: My return time is evening and I prefer economy class flight.

ASSISTANT: No flights found in the evening.

USER: That's ok, not a problem.

ASSISTANT: Thank you.

USER: Thanks for your information.