You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Scott Walker. Can you help me in booking the ticket from DCA to IAD?

ASSISTANT: Sure, I am glad to assist you with that. Could you please provide me your travel dates?

USER: My planning dates are from 03/25 to 03/27.

ASSISTANT: Ok, please wait a minute.

USER: I need a direct flight.

ASSISTANT: Sorry to inform you, there are no flights found in this route on the dates you have given.

USER: That's ok. Thank you.

ASSISTANT: You are welcome. Have a nice day.