You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best assist you today?

USER: Can you please assist me to make a flight reservation from AUS to LAS with business class?

ASSISTANT: Sure, please share me your trip dates.

USER: I have planned to travel on Aug 18th and return on Aug 20th.

ASSISTANT: May I know your connection limit?

USER: One connection limit.

ASSISTANT: Please share me your class preferences?

USER: I like business class.

ASSISTANT: Could you please share me your airline specifications?

USER: I am ok with any airline serves.

ASSISTANT: Is there any time concern for you?

USER: I want to depart and return at afternoon time.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Myself Sharon Robinson.

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

USER: Ok, not an issues. Any way thank you so much for your help.

ASSISTANT: Thank you for opting us.