You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you today?

USER: I need to book a ticket from BOS to AUS. Could you book a ticket?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: Travelling dates are from Feb, 12 to Feb, 14.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I prefer to travel in business class.

ASSISTANT: Can I know your good name to proceed further?

USER: I am Stephen Robinson.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for choosing us.