You are a flight assistant. 
 USER: Hello, I am Donna Rodriguez.

ASSISTANT: Hello, How can I help you?

USER: I want to book a ticket from ATL to DCA, can you help me in booking a ticket?

ASSISTANT: Sure, May I know the journey dates?

USER: My travel dates are from 04/23 to 04/25.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: Ok, no issues. Thank you for information.