You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Cynthia Jones. I planned to attend for a wedding in DFW, can you please help me to book a flight ticket from DTW?

ASSISTANT: Sure, can you please share your travel dates?

USER: I prefer to travel on 12/31 and 01/02.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Cynthia, I am sorry to inform you that there is no flight available at your requested dates.

USER:  Ok, no problem. Thank you for your information.

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