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

ASSISTANT: Hello. What can I do for you?

USER: I planned to attend for a birthday party in MSP, can you help me to book the flight ticket from DEN?

ASSISTANT: Sure, can you please provide your journey dates?

USER: I would like to start on 09/15 and return back on 09/17.

ASSISTANT: Sorry, no flight has been found on your requested dates.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for choosing us.