You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: May I know your travel dates?

USER: My travel dates are Jan 1 and Jan 3 respectively.

ASSISTANT: Do you prefer connecting flight?

USER: I prefer for direct flight.

ASSISTANT: Do you have any other specifications?

USER: No other preferences.

ASSISTANT: May I know your good name?

USER: William Evans here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.