You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Please book a ticket from IL-ORD to DC-DCA with connecting flight.

ASSISTANT: Surely, I will help you. May I know the travel dates?

USER: My travel dates are 08/10 and 08/12. My price should be 1000.

ASSISTANT: May I know your name?

USER: My name is Christine Smith.

ASSISTANT: Sorry, No reservation found with your dates. Sorry, No flights found.

USER: No problem, thank you for your information.

ASSISTANT: Thank you so much.