You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Will you please help me in booking a flight ticket from LAX to CLT?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Apr, 21 and Apr, 23 are my travel dates.

ASSISTANT: Ok, could I have your name please?

USER: Barbara Carter here.

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

USER: I need connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: No, thanks.

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

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

ASSISTANT: You are welcome, have a great day.