You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking a flight from ATL to DTW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are on Dec 12th to 14th.

ASSISTANT: Do you have any limits on number of connections?

USER: I prefer a direct flight to go.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: May I know your name for the booking process?

USER: Sure, my name is Pamela Moore.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Not a problem, thank you.

ASSISTANT: Welcome, thank you for reaching us.