You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

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

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: My travel dates are Feb 18 and 20.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I prefer to travel in business class.

ASSISTANT: Do you have any other criteria?

USER: I need a connecting flight.

ASSISTANT: May i know your name please?

USER: I am Scott White.

ASSISTANT: Sorry to inform, no flights are found with your criteria.

USER: No problem, thanks for checking.

ASSISTANT: Thank you very much for contacting our agency.