You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I am planning to book a flight ticket to AUS from MSP, can you please help me out?

ASSISTANT: May I know your trip dates?

USER: Sure, my trip dates are Dec 10 and Dec 12.

ASSISTANT: Let me know your connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you have any other requirements?

USER: Yes, my depart time must be in afternoon.

ASSISTANT: Can I have your name?

USER: Sure, my name is Carol Moore.

ASSISTANT: I regret to inform that there is no flight found with your required dates to travel.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.