You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Stephanie Allen. I want to book a ticket from DFW to DTW, can you please make a reservation?

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

USER: My travelling dates are on 03/09 and 03/11.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a single halt.

ASSISTANT: Do you have any other specifications?

USER: I prefer business class.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.