You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Please book a flight ticket in my preferable travel dates Feb, 5 and Feb, 7.

ASSISTANT: Sure, Please help me with your journey codes.

USER: My airport codes are ORD and DTW.

ASSISTANT: Do you have any connection limit?

USER: I would prefer to single connection.

ASSISTANT: Is there any other requirements?

USER: No, thanks.

ASSISTANT: May I know your name?

USER: David Taylor here.

ASSISTANT: Please wait a second.

USER: Sure.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for availing us.