You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I  would like to book a flight ticket from AUS to SFO.

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My travelling dates are 07/28 and 07/30.

ASSISTANT: Do you have any connection limit preference?

USER: I need a break in between the journey.

ASSISTANT: Do you have any airline preference?

USER: I want a normal cost airline.

ASSISTANT: May I know your good name please?

USER: I am William Lopez.

ASSISTANT: Do you have any other preferences?

USER: No , I do not have any other preferences.

ASSISTANT: William Lopez, there are no flight services are available on this route.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for contacting us.