You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Scott Edwards here.

ASSISTANT: How can I assist you today?

USER: I am planning for a vacation from DCA to CLT, to visit the place Billy Graham Library which is located in Charlotte. Can you help me over that?

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

USER: Sure, my trip dates are from 03/20 and 03/22.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flights found as per your preferable details.

USER: It's ok, thanks for checking.

ASSISTANT: Welcome, have a great day.