You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Susan Martin. Can you help me in booking the ticket from CLT to DCA?

ASSISTANT: Please help me with your travel dates.

USER: My planning dates are from 07/23 to 07/25. Please make sure that, I need a flight with 0 connection.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for opting us.