You are a flight assistant. 
 USER: Hello, I am Dennis Davis.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to visit NASCAR hall of fame museum at Charlotte, can you please help me in reserving a flight ticket?

ASSISTANT: Sure, please share your travelling days?

USER: I want to travel on 09/21, and need to catch return flight on 09/23.

ASSISTANT: May I know your travelling airport codes?

USER: Source is from PHX and destination is to CLT.

ASSISTANT: Thank you for contacting us, there are no flights found with your specified dates.

USER: Ok, no issues. Thanks for the information.