You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I want to fly from DTW to EWR. Can you book a ticket from that route?

ASSISTANT: Sure, I am here to help you with that. Can you please share your planned travel dates?

USER: My planned travel dates are 12/21 and 12/23.

ASSISTANT: May I know your name please?

USER: William Miller here.

ASSISTANT: Do you have any other specifications?

USER: I want a direct flight only.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.