You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please  help me in booking a flight ticket from CLT to ATL?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are 05/16 and 05/18.

ASSISTANT: There is no flight available on your desired travel dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us. May I know your name please?

USER: My name is Catherine Lopez.

ASSISTANT: Thank you.