You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Do you need any help from my side?

USER: I would like to travel from AUS to BOS as a business trip.

ASSISTANT: Sure, on what dates that you would like to book the ticket?

USER: My trip dates are 04/18 and 04/20.

ASSISTANT: Can I know your connection preference?

USER: I need only direct flight.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Can I know your good name please?

USER: Myself Margaret Allen.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight moving on your travel dates to book a flight ticket for your journey.

USER: No problem, Thanks for the information.

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