You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in booking my ticket from AUS to IAH.

ASSISTANT: Sure, may I know your name?

USER: My name is Justin Garcia.

ASSISTANT: Thank you. Please let me know your travel dates.

USER: My planned journey dates are Feb 13 and Feb 18.

ASSISTANT: Do you have any class preference?

USER: Yes, I would like to travel by connecting flight with business class.

ASSISTANT: Ok, please wait for a while. Let me check for the available flights.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates. Do you prefer to travel on any other dates?

USER: No issue, thank you for your assistance.

ASSISTANT: You are welcome and thank you for choosing us.