You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me in booking from CLT to ATL?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are from Apr 23 to Apr 25.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a flight with maximum of 1 connection.

ASSISTANT: Do you have any particular time for departing and returning?

USER: Yes, I need to return in afternoon.

ASSISTANT: May I know your good name please?

USER: My name is Sandra Allen.

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

USER: Ok, No issues. Thank you.

ASSISTANT: You are welcome.