You are a flight assistant. 
 USER: Hello, I am Robert Lewis.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket to Las Vegas, could you please help me in booking from AUS to LAS?

ASSISTANT: Sure, when are you planning to travel?

USER: My planned trip dates are 08/22 and 08/24.

ASSISTANT: Let me know your specifications?

USER: I need a direct flight.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us.