You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Kevin Parker.

ASSISTANT: Nice to meet you Parker.

USER:  I have an important meeting in CLT, so I need a flight ticket to go there. Can you please search a flight for me from DCA?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My preferable dates are from 09/21 to 07/23. Please check for direct flights.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: That's ok. Thank you for your time.

ASSISTANT: My pleasure.