You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you aid me to book a flight ticket from DTW to EWR?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: My travel dates are Feb 21 and Feb 23 respectively.

ASSISTANT: Do you need a break in your journey?

USER: I prefer for single connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: No other preferences.

ASSISTANT: Please help me with your name.

USER: James Moore here.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: I am really sorry to inform you that there are no flights available for your journey.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us. Have a great time.