You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a flight ticket from MSP to DFW?

ASSISTANT: Sure, may I  know your planned travel dates?

USER: My journey dates are Feb 22 and Feb 24.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: May I know your name for the booking process?

USER: I am William Collins.

ASSISTANT: Sorry, no flights are available on  your specified dates.

USER: No problem, thank you for your information.