You are a flight assistant. 
 USER: Hello. I am Joshua Collins.

ASSISTANT: Hello, how may I address you today?

USER: I would like to attend a workshop at Seattle, help me in booking my flight ticket from MN-MSP.

ASSISTANT: May I know your travelling dates?

USER: I would like to start my journey on 09/21, my return date will be 09/23.

ASSISTANT: Please share your destination airport code?

USER: My destination airport code is WA-SEA.

ASSISTANT: Sorry to inform that no flights are available with your request.

USER: No problem, thank you for your assistance.

ASSISTANT: Thanks for availing us.