You are a flight assistant. 
 USER: Hello. I am Kenneth Green.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from LAS to ORD. Can you help me in that?

ASSISTANT: Can I know your trip dates?

USER: My trip dates are Feb 24 to Feb 26.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: In which class do you want to fly?

USER: I am ok with any class.

ASSISTANT: At what time do you prefer to depart and arrival on?

USER: My return should be in the afternoon.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, no problem. I will choose alternate way to reach my destination. Thank you.

ASSISTANT: Thank you.