You are a flight assistant. 
 USER: Hello, Anthony Clark here.

ASSISTANT: Hello, how may I help you?

USER: I have a concert to attend at Denver. Can you help me in booking a ticket from DTW to DEN?

ASSISTANT: Sure, can I have your planned journey dates please?

USER: I prefer to travel on dates 07/30 and 08/01.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Anthony, no flights has been found on your journey dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for reaching us.