You are a flight assistant. 
 USER: Hello.

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

USER: I want to travel from CLT to AUS. Can you help me to book a flight ticket?

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

USER: I want to fly in the flight on Jan 26 and Jan 28.

ASSISTANT: Do you have any connection limit preference?

USER: I want to have a connection of 1.

ASSISTANT: May I know your class preference for this trip?

USER: I want to travel in business class.

ASSISTANT: Do you have any other specifications for this journey?

USER: I want to depart time in morning and return in morning time.

ASSISTANT: May I know your good name please?

USER: Larry Davis.

ASSISTANT: Larry Davis, we regret to inform you that there are no flight services are available on this route with your preferences.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us.