You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, may I know your name?

USER: I am Rachel White.

ASSISTANT: Can I know your depart and return dates?

USER: My travel dates are June 02 and June 04.

ASSISTANT: Do you prefer a connecting flight?

USER: I prefer direct flight for this trip.

ASSISTANT: May I know your other specifications?

USER: No, thanks for asking.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.