You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please book a flight ticket from DTW to JFK?

ASSISTANT: Sure, I am here to help you. May I know that when you have planned to travel?

USER: Yes, my travelling dates are 22 and 24 of June.

ASSISTANT: Do you prefer a connected flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: Ok, please specify your name.

USER: My name is Patricia Roberts.

ASSISTANT: Do you have any other concerns?

USER: No.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for choosing us.