You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, could you please tell us for what help you approached us?

USER:  I am looking for a flight from CLT to LAX can you please help me in booking?

ASSISTANT:  Sure, may I know your departure and arrival day?

USER: MY travelling dates are Mar 03 and Mar 05.

ASSISTANT: Ok, could I have your name please?

USER: My name is Dennis Robinson.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a direct flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

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

ASSISTANT: You are welcome, have a great day.