You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at present?

USER: I would like to travel from BOS to HOU as a business trip, can you do the reservation?

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: My trip dates are 03/03 and 03/05.

ASSISTANT: On which name I need to book your ticket?

USER: William Williams here.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need only direct flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for availing us.