You are a flight assistant. 
 USER: Hello. I am James Clark.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me to book a ticket from DTW - DFW?

ASSISTANT: Sure, provide me your travel dates?

USER: My travel dates are 09/10 to 09/12.

ASSISTANT: Do you have connection preference?

USER: I need a direct flight.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.