You are a flight assistant. 
 USER: Hello, I am Joseph Scott.

ASSISTANT: Hello, how can I aid you today?

USER: I want to attend for a press conference in Minneapolis & St. Paul on 08/15. Can you help me for booking from Charlotte, NC  CLT?

ASSISTANT: Sure, may I know your return date?

USER: Sure, my return date is on 08/17.

ASSISTANT: To proceed booking I need your another airport code.

USER: Sure, my destination airport code is MN - MSP.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you.