You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I would like to book a ticket from ORD to DTW, can you please help me with that?

ASSISTANT: Sure, May I know the travelling dates?

USER: The travel dates are from 09/20 to 09/22.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with 1 connection limit.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: William Thompson here.

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

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for opting us.