You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Dorothy Parker here. Can you help me to find a flight from CLT to DCA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are 06/02 and 06/04.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: That's fine, thanks for your information.