You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I serve you today?

USER: I need to book a flight ticket from AUS to PHX, can you help me in booking a flight ticket.

ASSISTANT: Sure, I am happy to help you. Let me know your planned trip dates.

USER: Thank you. Sure, my scheduled dates are Dec 19 and Dec 21.

ASSISTANT: Kindly mention your connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Is there any other requirements, please let me know?

USER: I prefer arrival time at afternoon. And I would like to fly in a economy class.

ASSISTANT: May I know your name please?

USER: Sure, Betty Martinez here.

ASSISTANT: There is no flight found with your matching information.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thank you.