You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Smith.

ASSISTANT: How can I guide you today?

USER: I have a business meeting in Charlotte, can you help me for booking a flight ticket from DCA to CLT?

ASSISTANT: Sure, I am here to help you in booking. Could you please share your travel dates?

USER: I would like to start my journey on 08/26 and my return will be on 08/28.

ASSISTANT: Please hold on for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome, thank you for choosing us.