You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need a flight on the route from Charlotte CLT to Washington DCA to visit my newspaper factory in Washington. Can you help me?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: I need a direct flight on the dates from 07/21 to 07/23.

ASSISTANT: May I know your name please?

USER: Sure, myself Nicole Johnson.

ASSISTANT: Ok Johnson, please wait a moment to check the flights availability.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights found with your requested dates of travelling.

USER: That is fine, thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Most welcome.