You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking the flight ticket from IAD to DTW?

ASSISTANT: Please provide your journey dates.

USER: My travel dates are Feb 14 and Feb 16.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a single connection flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Anthony Williams.

ASSISTANT: There are no flights available on your routes.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.