You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking from ORD to DCA?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are from Sept 1 to Sept 3.

ASSISTANT: Let me know your connection limit?

USER: I need a flight with maximum connection of one.

ASSISTANT: Any other preferences?

USER: I prefer business class.

ASSISTANT: Can I have your name please?

USER: My name is Frank Thomas.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, I will choose another airline. Thanks for the information.

ASSISTANT: Thank you for opting us.