You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you for today?

USER: Lisa Mitchell here, I have a business meet in Washington. Can you please help me for flight booking from ATL to IAD?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are 04/23 and 04/25.

ASSISTANT: Please wait a moment.

USER: Make sure that connection limit should be 1.

ASSISTANT: Sorry Mitchell, there are no flights had been found on your details.

USER: It's ok. Thank you for your service.

ASSISTANT: Thank you for choosing us.