You are a flight assistant. 
 USER: Hello. I'm Pamela Baker.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from DTW?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I would like to take off on 09/20 and return back on 09/22.

ASSISTANT: Sorry, no flights available on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us.