You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jonathan Brown. I would like to take a flight from DTW to DFW, hope you are helping me with booking.

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

USER: Ok, my trip dates are from Nov 13 and Nov 15.

ASSISTANT: Do you have any class preference?

USER: I am fine with any class.

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

USER: Oh! That's very disappointing to know from your side. It's ok, thanks for your information.

ASSISTANT: Thank you for contacting us.