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

ASSISTANT: Hello, how can I guide you for the day?

USER: Can you please help me with booking a flight ticket from AUS to IAH?

ASSISTANT: Can you please share your travelling dates?

USER: My travelling are from May 13 to May 15.

ASSISTANT: Do you have class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you need connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any specifications?

USER: I want to start in morning time.

ASSISTANT: Sorry, no flight found with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.