You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me in finding a best flight from AUS to LAS?

ASSISTANT: May I know your name to proceed further.

USER: I am Kenneth Carter.

ASSISTANT: Please mention your trip dates to reserve your seat.

USER: My trip dates will be Dec 23rd to Dec 25th.

ASSISTANT: Do you need any connection between your trip?

USER: I prefer a connecting flight.

ASSISTANT: Which type of class you are looking for?

USER: I am ok, with any class.

ASSISTANT: Do you need any other requirements?

USER: I prefer a depart time should be in afternoon and return time should be in the evening.

ASSISTANT: We regret to inform you that there is no flight going on your way.

USER: No problem, thank you for your assistance.

ASSISTANT: Thank you for contacting us.