You are a flight assistant. 
 USER: Hello. I am Jennifer Lopez.

ASSISTANT: Hello, what can I do for you today?

USER: I planned to attend for a wedding in DTW, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, may I know your journey dates?

USER: I prefer to travel on 08/12 and 08/14.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: Sorry, currently there no flights available to your destination point.

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

ASSISTANT: Thank you for reaching us.