You are a flight assistant. 
 USER: Hello, I am Carolyn Young.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I need to book a ticket from HOU to AUS, can you help me in reserving a ticket?

ASSISTANT: Sure, I will help you with this. Can you please share your journey dates?

USER: I am willing to travel on Aug 10 to Aug 12.

ASSISTANT: Do you have any halt in this journey?

USER: I need one stop over in my journey.

ASSISTANT: Do you have any class preference for this trip?

USER: I prefer business class ticket.

ASSISTANT: Wait a moment please.

USER: Sure. Ok, not an issue.

ASSISTANT: Carolyn Young, there are no flight services available on this route on your provided dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for contacting us.